Search results for: FLOW SIMULATION

• Experimental Verification of Storm Sewer Transient Flow Simulation

  Publication

  • M. Szydłowski

  - Archives of Hydro-Engineering and Environmental Mechanics - Year 2014

  The paper focuses mainly on laboratory investigations of transient and transcritical flow in a single pipe of a sewer system. The aim of this paper is to present a comparison between pressure values calculated by an improved McCormack scheme and those measured at the hydraulic laboratory of the Gdansk University of Technology, which were observed inside a pipe in an experiment for water flow with pressurization. The analysis proves...

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• River flow simulation based on the HEC-RAS system

  Publication

  • Z. Kowalczuk
  • M. Świergal
  • M. Wróblewski

  - Year 2017

  This work considers the problem of river floods, and presents a computer solution that can be used to predict such a threat. The basic tool, called Hydrologic Engineering Centers for River Analysis System (HEC-RAS), and created by the US Army Corps of Engineering, is well developed; and the models created in the system HEC-RAS are quite realistic. For the purpose of solving practical national flood problems, simplified static and...

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• River Flow Simulation Based on the HEC-RAS System

  Publication

  • Z. Kowalczuk
  • M. Świergal
  • M. Wróblewski

  - Advances in Intelligent Systems and Computing - Year 2018

  This work considers the problem of river floods, and presents a computer solution that can be used to predict such a threat. The basic tool, called Hydrologic Engineering Centers for River Analysis System (HEC-RAS), and created by the US Army Corps of Engineering, is well developed; and the models created in the system HEC-RAS are quite realistic. For the purpose of solving practical national flood problems, simplified static and...

  Full text to download in external service

• Numerical simulation of cold flow and combustion in a swirl stabilized combustor

  Publication

  • M. Amiri
  • P. Ziółkowski
  • K. Stasiak
  • M. Ditaranto
  • S. Wiseman
  • D. Mikielewicz

  - Year 2023

  A numerical simulation model was developed to investigate the cold flow and combustion using Ansys FLUENT 2021R1. The governing equations were solved using the pressure-based method, and pressure–velocity coupling was performed using the SIMPLE method. To model the turbulent process, the RSM model was used. Non-premixed model is chosen to solve the chemical kinetics between fuel and oxigen. Radiation heat transfer was calculated...

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• The numerical simulation of two-dimensional vertical incompressible viscous flow

  Publication

  • P. Zima

  - Year 2005

  W artykule przedstawiono numeryczne symulacje płaskiego pionowego przepływu nieściśliwej cieczy lepkiej ze swobodną powierzchnią. Zastosowano model bazujący na rozwiązaniu równań Naviera-Stokesa metodą "ciśnień" (SIMPLE). Przy takim podejściu otrzymano dywergencję równań Naviera-Stokesa oraz równanie Poissona na ciśnienie. W rozwiązaniu zastosowano schemat Laxa-Wendroffa z przesuniętą siatką Eulera. Takie podejście zapewnia dokładność...

• Numerical Simulation of Open Channel Flow between Bridge Piers

  Publication

  • M. Szydłowski

  - TASK Quarterly - Year 2011

  Przedstawiono dwuwymiarowy model przepływu wody płytkiej, który wykorzystano do symulacji przepływu wody w kanale otwartym w rejonie przekroju mostowego. Równania przepływu rozwiązano metodą objętości skończonych. Wyniki symulacji ruchu wody pomiędzy filarami mostowymi porównano z pomiarami laboratoryjnymi przeprowadzonymi w Laboratorium Hydrauliki i Inżynierii Środowiska politechniki Gdańskiej. Zgodność uzyskanych wyników obliczeń...

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• Simulation studies of process flow with in-line part inspection in machining cells

  Publication

  • M. Siemiątkowski
  • W. Przybylski

  - JOURNAL OF MATERIALS PROCESSING TECHNOLOGY - Year 2006

  Rozwinięto koncepcję zintegrowanego planowania i sterowania przebiegiem procesu w zrobotyzowanym elastycznym gnieździe obróbkowym (EGO)z maszyną współrzędnościową, realizującą funkcje pomiaru i kontroli wytwarzanych przedmiotów. Analizowano współzależności heurystycznych planów kontroli oraz stosowanych algorytmów szeregowania operacji procesów technologicznych wg określonych scenariuszy, z zastosowaniem programowalnych modeli...

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• Numerical Simulation of two dimensional flow past a bridge cross section

  Publication

  • B. Sobczyk

  - Year 2013

  This work presents some numerical results concerning application of CFD in civil engineering problems. Selected theoretical aspects of fluid mechanics are elucidated. In the second part of the paper a cross section of upper footbridge of the Bella Sky Hotel in Copenhagen is analysed numerically in the field of wind action.

• Numerical simulation of temperature distribution of heat flow on reservoir tanks connected in a series

  Publication

  • K. F. Iyanda
  • H. Rezazadeh
  • M. Inc
  • A. Akgül
  • M. I. Bshiru
  • M. B. Hafeez
  • M. Krawczuk

  - Alexandria Engineering Journal - Year 2023

  The flow of temperature distribution through a medium in thermodynamic studies plays an important role in understanding physical phenomena in chemical science and petroleum engineering, while temperature distribution indicates the degree of reaction that must be undergone to obtain the final product. Therefore, this paper aims to present and apply the exponential matrix algorithm (EMA), differential transformation algorithm (DTA),...

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• Numerical simulation of the quaternary aquifer groundwater flow of the northern Vistula delta plain

  Publication

  • W. Szpakowski

  - TASK Quarterly - Year 2007

  W pracy przedstawiono wyniki obliczeń krążenia wód podziemnych w czwartorzędowym poziomie wodonośnym rejonu Żuław Gdańskich. Czwartorzędowy poziom wodonośny odgrywa najważniejszą rolę w zaopatrzeniu w wodę aglomeracji gdańskiej. W obliczeniach wykorzystano programy Modflow i Modpath zawarte w pakiecie (GMS 3.1). Odtworzono warunki przed uruchomieniem ujecia Lipce wykorzystując obliczenia dla stanu ustalonego krążenia wody w warstwie...

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• Application of the Boundary Element Method for the Simulation of Two-dimensional Viscous Incompressible Flow

  Publication

  • D. Prybytak

  - Archives of Hydro-Engineering and Environmental Mechanics - Year 2015

  The paper presents the application of an indirect variant of the boundary element method (BEM) to solve the two-dimensional steady flow of a Stokes liquid. In the BEM, a system of differential equations is transformed into integral equations. Thi smakes it possible to limit discretization to the border of the solution. Numerical discretization of the computational domain was performed with linear boundary elements, for which a...

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• Simulation of water flow in double -porosity soils on unstructured grids with the finite element method.

  Publication

  • K. Burzyński
  • A. Szymkiewicz

  - TASK Quarterly - Year 2007

  Rozważa sie model przepływu wody w gruntowym ośrodku o podwójnej porowatości. Model matematyczny uzyskano poprzez zastosowanie teorii homogenizacji zastosowanej do gruntów o bardzo dużej różnicy przepuszczalności.

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• Numerical simulation of rapidly varied water flow in the ´Wild River´ type water slide

  Publication

  • K. Burzyński
  • M. Szydłowski

  - Archives of Hydro-Engineering and Environmental Mechanics - Year 2003

  Przedstawiono numeryczną analizę przepływu w zjeżdżalni wodnej typu "Dzika Rzeka". Jako model matematyczny przyjęto równania przepływu wody płytkiej. Wobec szybkozmiennego ruchu wody do rozwiązania zastosowano metodę objętości skończonych. Numeryczną symulację przepływu wykonano na trójkątnej siatce niestrukturalnej. Wyniki obliczeń porównano z obserwacjami na obiekcie rzeczywistym zainstalowanym w parku wodnym w Sopocie. Dodatkowo...

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• Numerical simulation of transient flow in storm sewers using standard and improved mccormack scheme

  Publication

  • M. Szydłowski
  • J. Machalińska-Murawska

  - TASK Quarterly - Year 2012

  Problem przepływu wody w rurach kanalizacji deszczowej wiąże się z pewnymi specyficznymi zjawiskami zachodzącymi w przewodach podczas zjawisk burzowych. Jeśli rury zaczynają być całkowicie wypełnione wodą, można zaobserwować przejście z ruchu ze swobodną powierzchnią do ruchu pod ciśnieniem i odwrotnie. Takie zjawisko można zaobserwować również w kanałach kontrolowanych przez urządzenia sterujące, np. zasuwy. Ponadto ruch szybkozmienny...

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• Computational Fluid Dynamics Simulation of Gas–Liquid Multiphase Flow in T-junction for CO2 Separation

  Publication

  • S. Wrzesień
  • P. Madejski
  • P. Ziółkowski

  - Prace Naukowe Wydziału Architektury Politechniki Wrocławskiej - Year 2020

  The article presents the results of a computational fluid dynamics (CFD) analysis of gas-liquid multiphase flow. The simulation was conducted using CFD code and the Euler–Euler approach. The presented study relates to the non–reactive, steady-state, turbulent flow of water and carbon dioxide mixture in a 3D pipe. Separation phenomenon between phases is observed. The solution was obtained using a mixture model. Different values...

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• Lax-Wendroff and McCormack Schemes for Numerical Simulation of Unsteady Gradually and Rapidly Varied Open Channel Flow

  Publication

  • J. Machalińska-Murawska
  • M. Szydłowski

  - Archives of Hydro-Engineering and Environmental Mechanics - Year 2013

  Two explicit schemes of the finite difference method are presented and analyzed in the paper. The applicability of the Lax-Wendroff and McCormack schemes for modeling unsteady rapidly and gradually varied open channel flow is investigated. For simulation of the transcritical flow the original and improved McCormack scheme is used. The schemes are used for numerical solution of one dimensional Saint-Venant equations describing free...

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• Simulation of unsteady flow over floodplain using the diffusive wave equation and the modified finite element method

  Publication

  • R. Szymkiewicz
  • D. Gąsiorowski

  - JOURNAL OF HYDROLOGY - Year 2012

  We consider solution of 2D nonlinear diffusive wave equation in a domain temporarily covered by a layer of water. A modified finite element method with triangular elements and linear shape functions is used for spatial discretization. The proposed modification refers to the procedure of spatial integration and leads to a more general algorithm involving a weighting parameter. The standard finite element method and the finite difference...

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• Modeling and simulation of blood flow under the influence of radioactive materials having slip with MHD and nonlinear mixed convection

  Publication

  • S. Afzal
  • M. Qayyum
  • M. Riaz
  • A. Wojciechowski

  - Alexandria Engineering Journal - Year 2023

  Radioactive materials are widely in industry, nuclear plants and medical treatments. Scientists and workers in these fields are mostly exposed to such materials, and adverse effects on blood and temperature profiles are observed. In this regard, objective of the current study is to model and simulate blood based nanofluid with three very important radioactive materials, named as Uranium dioxide (UO2), Thorium dioxide (ThO2) and...

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• The flow of nitrogen into the euphotic zone of the Baltic Proper as a result of the vertical migration of phytoplankton: An analysis of the long-term observations and ecohydrodynamic model simulation

  Publication

  • M. Kowalewski

  - JOURNAL OF MARINE SYSTEMS - Year 2015

  Full text to download in external service

• Robust procedure for flow coefficient calculation. W: Recent advances in simulation, computational methods and soft computing. Ed. W. Nikos, E. Ma-torakis. New York: WSEAS Press**2002 s. 152-155, 5 rys. bibliogr. 7 poz. Krzepka procedura obliczania współczynnika przepływu.

  Publication

  • T. Kiczkowiak
  • W. Tarnowski
  • S. Grymek

  - Year 2002

  W pracy przedstawiono efektywne i szybkie metody obliczania współczynnikaprzepływu powietrza na podstawie znanych: stosunku ciśnień statycznych i oporności dźwiekowej (patrz norma ISO6358).

• Sylwester Kaczmarek dr hab. inż.

  People

  Department of Teleinformation Networks

  Sylwester Kaczmarek received his M.Sc in electronics engineering, Ph.D. and D.Sc. in switching and teletraffic science from the Gdansk University of Technology, Gdansk, Poland, in 1972, 1981 and 1994, respectively. His research interests include: IP QoS and GMPLS and SDN networks, switching, QoS routing, teletraffic, multimedia services and quality of services. Currently, his research is focused on developing and applicability...

• Jacek Tomków dr hab. inż.

  People

  Institute of Manufacturing and Materials Technology

  Education:1. 2018 - Ph.D. of Technical Sciencesin field of Materials Engineeringthesis: Influence of underwater welding conditions on cold cracking of high strength low alloy steel 2. 2012 - Master of Science Engineer, Gdansk University of Technologyin the field of: Mechanical Engineeringwith specialization in: Manufacturing Engineering and Computer Aided Manufacturing Processesthesis: Non-destructive testing of welding joints...

• MODELLING OF TRANSIENT FLOW IN STORM SEWERS

  Publication

  • M. Szydłowski

  - Year 2013

  The paper focuses on the assessment of second-order explicit numerical scheme for unsteady flows in sewers. In order to simulate the pressurized flow the 'Preissmann slot' concept is implemented. For simulation of the transcritical flow the original and improved McCormack scheme is used. The calculated results are compared with numerical solutions and laboratory measurements published in the technical literature. Moreover, the...

• CFD Simulations and Tests of a Prototype Flow Control Valve

  Publication

  • M. Zaleska-Patrosz
  • P. Patrosz
  • P. Śliwiński

  - Year 2021

  In this paper a prototype of a flow control valve is described and numerically simulated. The flow control valve is used in hydraulic systems to maintain constant fluid flow despite changing loads of a receiver. The standard construction of this type of valves is modified mainly by eliminating the spring. The prototype consists the hydrostatically unloaded throttle valve and pressure ratio valve substituting pressure difference...

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• Numerical Simulations for Transonic Flow in Control Valve

  Publication

  • P. Flaszyński
  • P. Doerffer
  • G. Mikułowski
  • J. holnicki-Szulc

  - Year 2013

  Results of numerical simulations for transonic flow in control valve are presented. The valve is the main part of an adaptive pneumatic shock absorber. Flow structure in the valve domain and the influence of the flow non-uniformity in the valve on a mass flow rate is investigated. Numerical simulation results are compared with experimental data.

• Dariusz Mikielewicz prof. dr hab. inż.

  People

  Zakład Systemów i Urządzeń Energetyki Cieplnej, Gdańsk University of Technology, Institute of Energy

  Professor Dariusz Mikielewicz – born on February 6, 1967. in Gdansk. Here in 1974 he enrolled first to the Elementary School No. 17, and then in the Grammar School No. 5, named after Stefan Żeromski in Gdansk-Oliwa. After graduating from the Secondary School, with honors, in 1985 he successfully passed the entrance exams to the Faculty of Mechanical Engineering of Technical University of Gdansk, where he graduated with a very good...

• Determination of the uncertainty of mass flow measurement using the orifice for different values of the Reynolds number

  Publication

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec
  • R. Hanus
  • M. Zych
  • D. Świsulski

  - Year 2019

  Standard orifice flowmeters are widely used in the chemical and energy industry. Therefore, it is essential to know how accurate the measurements made with these instruments are. The paper presents an estimation of measurement uncertainty of a liquid mass flow using the orifice plate. The authors will present the influence of ranges of the Reynolds number on the estimated uncertainty, obtained on the basis of simulation and laboratory...

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• Simulation of signal acquisition from a rotary flowmeter

  Open Research Data

  open access

  • D. Świsulski

  The dataset contains results of simulation measuring the flow of homogeneous substances by rotational flow meter: a moment of impulse at the output of flow meter, time between successive pulses, number of pulses counted from standard generator and relative error of measurement.

• QoS Extensions for Flow-Awareness Networks

  Publication

  • S. Kaczmarek
  • M. Wolff

  - International Journal of Electronics and Telecommunications - Year 2022

  The paper contains a description and research results of the proposal for distributed QoS extensions for Flow-Based Networking. These QoS extensions let the network accept or reject flows based on current network load and QoS promises for each of the flows. Proposed solution consists of two distributed components, each of them performing in every node, measurement system and access control. The solution could be applied in any...

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• The assessment of metrological properties of segmental orifice based on simulations and experiments

  Publication

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec
  • R. Hanus
  • M. Zych
  • M. Heronimczak
  • D. Świsulski

  - MEASUREMENT - Year 2021

  Segmental orifices are often used to measure flows of heterogeneous mixtures, especially in flow meters in the power industry, for example. The orifice (with module m= 0.25) was installed in a stainless-steel pipe with internal diameter of 50 mm, placed in a hydraulic water system. The research was performed for Reynolds numbers ranging from 9,000 to 17,000. The flow characteristics of this orifice obtained based on simulation...

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• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 20 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 14 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 20 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 20 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 20 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 20 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 14 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 14 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 25 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 14 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 500 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 100 mm piston diameter, 32 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 100 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 12 mm piston rod diameter and 200 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 32 mm piston diameter, 14 mm piston rod diameter and 50 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Simulation of a linear pneumatic actuator with 63 mm piston diameter, 25 mm piston rod diameter and 25 mm stroke

  Open Research Data

  open access

  • S. Grymek
  • T. Kiczkowiak

  - series: Dynamics of a pneumatic actuator - simulation

  The aim of the simulation was to determine the dynamics of linear pneumatic actuators with different sizes and flow properties. The simulation used the actuator dynamics model as described in [1] and the St Venant - Wantzel's mass flow rate model. The simulation experiment was to calculate the pressure changes in both chambers of the actuator as well...

• Modeling and simulation of tool cycle in manufacturing cell

  Publication

  • M. Dobrzyński

  - Solid State Phenomena - Year 2010

  The paper addresses issues concerning modeling and analysis of tool flow within a three-machine manufacturing cell used for small batch manufacturing of a definite spectrum of prismatic parts. The approach utilizes a method for job and tool allocation to work centers with limited number of machines and capacity of tool resources, based on the analysis of formalized relations: job - tool sets required. Selected tool flow control...

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• Analytical Steady-State Model of the Pipeline Flow Process

  Publication

  • Z. Kowalczuk
  • M. S. Tatara

  - Year 2018

  The paper addresses the issue of modeling the flow process in transmission pipelines. A base model used for numerical simulation is introduced. Under certain assumptions concerning steady state analysis, the differential equations describing the process are solved analytically for two cases: zero and nonzero inclination angle α. These equations describe a constant flow rate and a corresponding distribution of the pressure along...

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• Recent progress in experimental studies of electrohydrodynamic flow in electrostatic precipitators

  Publication

  • J. Mizeraczyk
  • J. Podliński
  • A. Niewulis
  • A. Berendt

  - Journal of Physics : Conference Series - Year 2013

  Many experimental, theoretical and numerical works were devoted to the electrohydrodynamic (EHD) flow generated in electrostatic precipitators (EPSs). The generally accepted conclusion from these studies is that the EHD flow plays an important role in the particle collection in ESPs. However, despite of the recent fast progress in numerical simulation and experimental techniques used in the ESPs studies many problems related to...

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• Initial Report on Numerical Modeling of Blood Flow in Myocardial Bridge Region of Coronary Artery: Concept of Model Validation

  Publication

  • B. Melka
  • M. L. Nowak
  • M. Rojczyk
  • M. Gracka
  • W. Adamczyk
  • Z. Ostrowski
  • R. Białecki

  - Year 2021

  The paper presents a numerical method of blood flow simulation within the coronary artery covered by the myocardial bridge. The myocardial bridge is a congenital coronary abnormality caused by the blood vessel location under one of the heart muscles. In this case, the blood flow within the vessel is partially disturbed which can cause several consequences. The presented numerical simulation allowed us to estimate the blood flow...

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• Numerical single-phase modeling of turbulent flow and heat transfer of nanofluids

  Publication

  • H. Boertz
  • A. Baars
  • J. Cieśliński
  • S. Smoleń

  - Year 2015

  In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (6 000< Re < 12 000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with published experimental data.

• Uncertainty of mass flow measurement using centric and eccentric orifice for Reynolds number in the range 10,000 ≤ Re ≤ 20,000

  Publication

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec
  • R. Hanus
  • M. Zych
  • D. Świsulski

  - MEASUREMENT - Year 2020

  The article analyses the impact of the Reynolds number on the estimated uncertainty of the mass flow rate measurement using an orifice plate. The objects of the research were two types of orifices: centric (ISA) and eccentric, with the diameter ratio β = 0.5. Studies were performed by Monte Carlo simulation and experiments for Reynolds numbers in the range 10,000 ≤ Re ≤ 20,000. The obtained results have shown that for both orifice...

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• A numerical and experimental analysis of multi-hole orifice in turbulent flow

  Publication

  • A. Golijanek-Jędrzejczyk
  • A. Mrowiec
  • S. Kleszcz
  • R. Hanus
  • M. Zych
  • M. Jaszczur

  - MEASUREMENT - Year 2022

  In this research study, the comprehensive metrological analysis is investigated for a 4-hole orifice with module m = 0.25 installed in the pipeline with an internal diameter of 50 mm. A detailed numerical simulation was performed for the turbulence models: k-ε-realizable and k-ω-BSL. The novelties of the research include model validation by comparing the results of numerical studies with the experiment conducted in the area of...

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• A New Approach for the Mitigating of Flow Maldistribution in Parallel Microchannel Heat Sink

  Publication

  • K. Ritunesh
  • G. Singh
  • D. Mikielewicz

  - JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME - Year 2018

  The problem of flow maldistribution is very critical in microchannel heat sinks (MCHS). It induces temperature nonuniformity, which may ultimately lead to the breakdown of associated system. In the present communication, a novel approach for the mitigation of flow maldistribution problem in parallel MCHS has been proposed using variable width microchannels. Numerical simulation of copper made parallel MCHS consisting of 25 channels...

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• Numerical Modeling of Water and Ice Dynamics for Analysis of Flow Around the Kiezmark Bridge Piers

  Publication

  • M. Szydłowski
  • T. Kolerski

  - GeoPlanet: Earth and Planetary Sciences - Year 2018

  This paper presents the results of a numerical model study on the effect of ice on the proposed bridge piers in the Vistula River outlet and its effect on flow conditions in the river. The model DynaRICE is used in this study, which is a two-dimensional hydro-ice dynamic numerical model developed for dynamic ice transport and jamming in rivers. To simulate river hydrodynamics in the vicinity of the bridge piers, 2-dimensional numerical...

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• Interline power flow controller - properties and control strategy in dynamic states

  Publication

  • R. Strzelecki
  • P. Smereczynski
  • G. Benysek

  - Year 2005

  High-power electronic converter topologies, in such forms as Unified Power Flow Controllers (UPFC), Static Compensators (STATCOM) and Interline Power Flow Controllers (IPFC), have been used to enhance and optimize the use of transmission facilities, under the concept of a flexible ac transmission system (FACTS). In Europe, the anticipated proliferation of distributed-generation (DG) in the near future, driven by governmental initiatives...

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• Flow Process Models for Pipeline Diagnosis

  Publication

  • Z. Kowalczuk
  • M. S. Tatara

  - Year 2021

  This chapter examines the problem of modeling and parameterization of the transmission pipeline flow process. First, the base model for discrete time is presented, which is a reference for other developed models. Then, the diagonal approximation (AMDA) method is proposed, in which the tridiagonal sub-matrices of the recombination matrix are approximated by their diagonal counterparts, which allows for a simple determination of...

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• Influence of Gaps’ Geometry Change on Leakage Flow in Axial Piston Pumps

  Publication

  • P. Patrosz

  - Year 2021

  Axial piston pumps are the core elements of most medium and high-pressure hydraulic systems. High volumetric efficiency and high working pressures are the main advantages of this type of pumps. Therefore it is necessary to accurately calculate the leakage flow through the gaps to design efficient high-pressure pump. The main difficulty of such calculations is the fact, that the gaps change their geometry during pumping process....

  Full text available to download

• Turbulence model evaluation for numerical modelling of turbulent flow and heat transfer of nanofluids

  Publication

  • H. Boertz
  • A. Baars
  • J. Cieśliński
  • S. Smoleń

  - Applied Mechanics and Materials - Year 2016

  In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...

• Numerical Analysis of Turbulent Flow over a Backward-facing Step in an Open Channel

  Publication

  • B. K. M. Saleem
  • A. M. Mustafa
  • D. A. Kareem
  • M. I. Yüce
  • M. Szydłowski

  - Archives of Hydro-Engineering and Environmental Mechanics - Year 2023

  Computational examinations of the flow field in an open channel having a single Backward--Facing Step (BFS) with a constant water depth of 1.5 m were performed. The effects of the expansion ratio, and the flow velocity along the reattachment length, were investigated by employing two different expansion ratios of 1.5 and 2, and eight various flow velocities of 0.5, 1, 2, 3, 4, 5, 7.5 and 10 m/sec in the Computational Fluid Dynamic...

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• Numerical Study of the Impinging Jets Formed by an Injector with Different Nozzle Diameters

  Open Research Data

  open access

  • B. Kaźmierski
  • Ł. J. Kapusta

  The data set contains the simulation files related to the research paper “Numerical Study of the Impinging Jets Formed by an Injector with Different Nozzle Diameters”, https://doi.org/10.4271/2022-01-1080.

• Modelling of shear zones during quasi-static granular silo flow using material point method (MPM)

  Publication

  • J. Krzyżanowski
  • J. Tejchman
  • W. Sołowski
  • M. Wójcik

  - POWDER TECHNOLOGY - Year 2021

  The paper focuses on confined silo flow of cohesionless sand. The problem considered is a quasi-static flow in a plane strain model silo with parallel walls simulated with the material point method (MPM). The simulation used a non-local hypoplastic constitutive model. Initially, the paper validated the implemented numerical approach with basic element tests and a plane strain compression test. The subsequent MPM calculations for...

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• Effects of subfilter velocity modelling on dispersed phase in LES of heated channel flow

  Publication

  • J. Pozorski
  • M. Knorps
  • M. Łuniewski

  - Journal of Physics : Conference Series - Year 2011

  A non-isothermal turbulent flow with the dispersed phase is modelled using the Large Eddy Simulation (LES) approach for fluid, one-way coupled with the equations of point-particle evolution. The channel is heated at both walls and isoflux boundary conditions are applied for fluid. Particle velocity and thermal statistics are computed. Of particular interest are the r.m.s. profiles and the probability density function of particle...

  Full text available to download

• Thermo-Mechanical Simulation of Underwater Friction Stir Welding of Low Carbon Steel

  Publication

  • S. Memon
  • J. Tomków
  • H. A. Derazkola

  - Materials - Year 2021

  This article investigates the flow of materials and weld formation during underwater friction stir welding (UFSW) of low carbon steel. A thermo-mechanical model is used to understand the relation between frictional heat phenomena during the welding and weld properties. To better understand the effects of the water environment, the simulation and experimental results were compared with the sample prepared by the traditional friction...

  Full text available to download

• Analytical ‘Steady-State’-Based Derivation and Clarification of the Courant-Friedrichs-Lewy Condition for Pipe Flow

  Publication

  • Z. Kowalczuk
  • M. S. Tatara

  - Journal of Natural Gas Science and Engineering - Year 2021

  This article addresses the problem of choosing the optimal discretization grid for emulating fluid flow through a pipeline. The aggregated basic flow model is linearized near the operating point obtained from the steady state analytic solution of the differential equations under consideration. Based on this model, the relationship between the Courant number (μ) and the stability margin is examined. The numerically set coefficient...

  Full text available to download

• Micro-modelling of shear localization during quasi-static confined granular flow in silos using DEM

  Publication

  • A. Grabowski
  • M. Nitka
  • J. Tejchman

  - COMPUTERS AND GEOTECHNICS - Year 2021

  The paper deals with the quasi-static confined flow of cohesionless sand in a plane strain model silo with parallel walls and a slowly movable bottom. Numerical modelling was carried out by the discrete element method (DEM) using spheres with contact moments to approximately capture a non-uniform shape of sand particles. Different initial void ratios of sand and silo wall roughness grades were employed. Regular triangular grooves...

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• Flow structure, heat transfer and scaling analysis in the case of thermo-magnetic convection in a differentially heated cylindrical enclosure

  Publication

  • E. Fornalik-Wajs
  • P. Filar
  • J. Wajs
  • A. Roszko
  • L. Pleskacz
  • H. Ozoe

  - Journal of Physics : Conference Series - Year 2014

  The experimental, numerical and scaling analysis in the case of thermo-magnetic convection in a thermosyphon-like enclosure filled with a paramagnetic fluid is presented. Visualization of temperature field together with the numerical simulation gave an information about the flow structure, which indicated “finger-like” structures of hot and cold streams advecting each other. Their number depended on the Rayleigh number and also...

  Full text available to download

• Numerical Study of Turbulent Flow and Heat Transfer of Nanofluids in Pipes

  Publication

  • H. Boertz
  • A. Baars
  • J. Cieśliński
  • S. Smoleń

  - HEAT TRANSFER ENGINEERING - Year 2018

  In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...

  Full text available to download

• Numerical study of turbulent flow and heat transfer of nanofluids in pipes

  Publication

  • J. Cieśliński
  • H. Boertz
  • A. Baars
  • S. Smoleń

  - Year 2015

  In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (6 000 < Re < 12 000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data of Vajjha et al. [1]. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid...

• Combining X-ray tomogrpahy imaging and DEM simulations to investigate granular material flow during silo discharging

  Publication

  • K. Miśkiewicz
  • M. Niedostatkiewicz
  • K. Grudzień
  • B. Laurent

  - Year 2018

  Even after few decades of research, the study of particle motion taking place during silo discharging hasn’t been fully addressed, both experimentally and numerically, because of nontrivial behaviors that occur during associated flow patterns. For instance, discrete element method (DEM) has shown good qualitative prediction potential of velocity profile, but, on the other hand, frequently failed to match quantitatively experimental...

• Time Delay Estimation in Two-Phase Flow Investigation Using the γ-Ray Attenuation Technique.

  Publication

  • R. Hanus
  • M. Zych
  • L. Petryka
  • D. Świsulski

  - MATHEMATICAL PROBLEMS IN ENGINEERING - Year 2014

  Time delay estimation is an important research question having many applications in a range of technologies. Measurement of a two-phase flow in a pipeline or an open channel using radioisotopes is an example of such application. For instance, the determination of velocity of dispersed phase in that case is based on estimation of the time delay between two stochastic signals provided by scintillation probes. The proper analysis...

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• Performance of FAN conception of traffic control in IP QoS networks

  Publication

  • S. Kaczmarek
  • M. Landowski

  - Year 2008

  In this paper we present the architectural implementation of Flow Aware Networking (FAN), a new approach for realizing QoS guarantees in the Internet. We also propose FAN traffic control algorithm which performs traffic control on flow level. Using the proposed FAN node model, we conduct simulation research to prove if FAN can be a new approach for realizing QoS guarantees. The basis of this research is finding a way to guarantee...

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• Multiscale model for blood flow after a bileaflet artificial aortic valve implantation

  Publication

  • M. L. Nowak
  • E. Divo
  • W. P. Adamczyk

  - COMPUTERS IN BIOLOGY AND MEDICINE - Year 2023

  Cardiovascular diseases are the leading cause of mortality in the world, mainly due to atherosclerosis and its consequences. The article presents the numerical model of the blood flow through artificial aortic valve. The overset mesh approach was applied to simulate the valve leaflets motion and to realize the moving mesh, in the aortic arch and the main branches of cardiovascular system. To capture the cardiac system’s response...

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• Effects of Noncontact Shoulder Tool Velocities on Friction Stir Joining of Polyamide 6 (PA6)

  Publication

  • R. Al-Sabur
  • H. I. Khalaf
  • A. Świerczyńska
  • G. Rogalski
  • H. A. Derazkola

  - Materials - Year 2022

  In this study, the effects of the traverse and rotational velocities of the noncontact shoulder tool on the heat generation and heated flux during the friction stir joining of high-density polyamide 6 (PA6) polymer were investigated. The computational fluid dynamics (CFD) method was employed to simulate the thermomechanical phenomena during the friction stir joining (FSJ) process of PA6. A developed model was used to consider the...

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• Influence of addition of carbon nanotubes on rheological properties of selected liquid lubricants - a computer simulation study

  Publication

  • A. Chopra
  • S. Winczewski

  - TASK Quarterly - Year 2020

  This work is motivated by the improvement of anti-friction properties of lubricants by addition of CNTs proved experimentally in literature. In particular, a methodology is developed to compute the shear viscosity of liquid lubricants (Propylene Glycol) based on Molecular Dynamics simulation. Non-Equilibrium molecular dynamics (NEMD) approach is used with a reactive force field ReaxFF implemented in LAMMPS. The simulations are...

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• Impact of maintenance of floodplains of the Vistula River on high water levels on the section from Włocławek to Toruń

  Publication

  • D. Gąsiorowski
  • M. Szydłowski

  - Acta Energetica - Year 2013

  This article describes the methodology of hydraulic calculations to estimate the water levels in open channels for steady gradually varied flow. The presented method has been used to analyse the water level on the Vistula River from Włocławek cross-section to Toruń cross-section. The HEC-RAS modelling system has been used for parameterization of the river channel and floodplains, as well as for flow simulation. The results obtained...

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• Hybrid storage management system consisting of supercapacitors and AHI batteries

  Publication

  • L. Wolski
  • E. Łowiec
  • P. Bogusławski
  • A. Krahel
  • W. Matelski
  • R. Strzelecki

  - Year 2018

  In the article the hybrid storage, composed of Aqueous Hybrid Ion battery and supercapacitor was presented. The system was tested through simulation studies. The work also describes the construction and properties of the developed device meant to control the energy flow of the storage and a communication system for remote parameter supervision.

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• Numerical analysis of the ostiomeatal complex aeration using the CFD method

  Publication

  • D. Tretiakow
  • K. Tesch
  • K. Markiet
  • T. Przewoźny
  • A. Kusiak
  • D. Cichońska
  • A. Skorek

  - Scientific Reports - Year 2023

  We aimed to analyse ostiomeatal complex (OMC) aeration using the computational fluid dynamics (CFD) method of simulation based on human craniofacial computed tomography (CT) scans. The analysis was based on CT images of 2 patients: one with normal nose anatomy and one with nasal septal deviation (NSD). The Reynolds-Average Simulation approach and turbulence model based on linear eddy viscosity supplemented with the two-equation...

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• Minichannel and minigap classification criteria based on the aspect ratio of the minigeometry: A numerical study

  Publication

  • P. Dąbrowski
  • R. Kumar

  - INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER - Year 2021

  A detailed numerical investigation has been carried out to analyze the diabatic flow distribution and velocity profile in 18 minigeometries with various aspect ratios for V-type and I-type flow configurations (for 36 cases) assuming ethanol as a working fluid. The aim of the study is to distinguish the value of the aspect ratio for which the flow in minigeometry starts to be two-dimensional (minigap). Cases with a constant Reynolds...

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• Modelling hydraulic and capillary-driven two-phase fluid flow in unsaturated concretes at the meso-scale with a unique coupled DEM-CFD technique

  Publication

  • M. Krzaczek
  • M. Nitka
  • J. Tejchman

  - INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS - Year 2023

  The goal of the research was to demonstrate the impact of thin porous interfacial transition zones (ITZs) between aggregates and cement matrix on fluid flow in unsaturated concrete caused by hydraulic/capillary pressure. To demonstrate this impact, a novel coupled approach to simulate the two-phase (water and moist air) flow of hydraulically and capillary-driven fluid in unsaturated concrete was developed. By merging the discrete...

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• Investigation on polypropylene friction stir joint: effects of tool tilt angle on heat flux, material flow and defect formation

  Publication

  • F. Guangle
  • J. Tomków
  • M. E. Abdullah
  • H. A. Derazkola

  - Journal of Materials Research and Technology-JMR&T - Year 2023

  Tool tilt angle (TTA) is a critical factor that can control material flow in polymeric materials' friction stir joining (FSJ). This study selected a TTA range between 0° to 4° for FSJ of polypropylene (PP) polymer sheet. A modified computational fluid dynamic (CFD) technique was implemented to gain a deep understanding of the effects of TTA during FSJ of PP. The PP joint's internal flow, defect formation, heat generation, and tensile...

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• Maxillary sinus aeration analysis using computational fluid dynamics

  Publication

  • D. Tretiakow
  • K. Tesch
  • K. Markiet
  • A. Skorek

  - Scientific Reports - Year 2022

  The maxillary sinus aeration using the computational fluid dynamics (CFD) method based on individual adult patients’ computed tomography (CT) scans were analyzed. The analysis was based on CT images of 4 patients: one with normal nose anatomy and three with nasal septal deviation (NSD) and concha bullosa (CB). The CFD simulation was performed using the Reynolds-Average Simulation approach and turbulence closure based on linear...

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• Parametric study of fluid flow and heat transfer over louvered fins of air heat pump evaporator

  Publication

  • T. Muszyński
  • S. Kozieł

  - Archives of Thermodynamics - Year 2016

  Two-dimensional numerical investigations of the fluid flow and heat transfer have been carried out for the laminar flow of the louvered fin-plate heat exchanger, designed to work as an air-source heat pump evap- orator. The transferred heat and the pressure drop predicted by simulation have been compared with the corresponding experimental data taken from the literature. Two dimensional analyses of the louvered fins with varying...

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• Electrochemical simulation of enzymatic transformations studied for the selected antitumor acridine derivatives

  Publication

  • A. Potęga
  • W. Hewelt-Belka
  • O. Siewruk
  • K. Zapała
  • Z. Mazerska

  - Year 2014

  The elucidation of the metabolic pathways and the biotransformation mechanisms of potential drugs is a crucial point in drug development. It allows to know the activation routes of the new biologically active compounds, especially in respect to their possible toxicity. Generally, in vivo or in vitro experiments with liver microsomes or hepatocytes are performed. However, these testing schemes are tedious, time consuming and of...

• Air trapping problem during infiltration on the large areas

  Publication

  • W. Tisler
  • A. Szymkiewicz

  - Year 2018

  The process of flow modeling in unsaturated porous medium is often found in many fields of sciences: geology, fluid mechanics, thermodynamics, microbiology or chemistry. Problem is relatively complicated due to complexity of the system which contains three phases: water, air and soil skeleton. The flow of water in such a medium can be described using two-phase (2PH) flow formulation, which accounts the inflow of air and water phases,...

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• Ocena zastosowania wybranych reguł wymiany narzędzi w systemie produkcyjnym

  Publication

  • M. Dobrzyński

  - Ekonomika i Organizacja Przedsiębiorstwa - Year 2008

  In this paper, an integrated analytical and simulation modelling framework has been developed with the objective to explore total system planning and operational issues. It enables in particular structuring the alternative process flow in manufacturing systems and their extended investigation under different tool exchange rules with limited number of tool inventory. Simulation studies performed with the proposed rules in the environment...