Wyniki wyszukiwania dla: NUMERICAL%20STUDY

• NUMERICAL ALGORITHMS

  Czasopisma

  ISSN: 1017-1398 , eISSN: 1572-9265

• Experimental study and numerical optimization of tensegrity domes – A case study

  Publikacja

  • K. Winkelmann
  • F. Kłos
  • M. Rąpca

  - Rok 2018

  The paper deals with the design, experimental analysis and numerical optimization of tensegrity dome models. Two structures are analyzed – a Geiger system dome (preliminary dome), with PVC-U bars and PA6/PP/PET tendons and a Fuller system dome (target dome), with wooden bars and steel cables as tendons. All used materials are experimentally tested in terms of Young's modulus and yield stress values, the compressed bars are also...

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• An Experimental and Numerical Study of the Vortces Generated by Hydrofoils

  Publikacja

  • J. Szantyr
  • R. Biernacki
  • P. Flaszyński
  • P. Dymarski
  • M. Kraskowski

  - Polish Maritime Research - Rok 2009

  Artykuł przedstawia wyniki projektu badawczego poświęconego wirom generowanym przez płaty nośne. W części eksperymentalnej wykonano anemometrem laserowym pomiary pól prędkości w poprzecznych przekrojach wirów. W częsci numerycznej przeprowadzono obliczenia używając różnych struktur siatki obliczeniowej i różnych modeli turbulencji. Na podstawie porównania wybrano model turbulencji i strukturę siatki najlepiej odzwieciedlające pole...

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• An Experimental and Numerical Study of Tip Vortex Cavitation

  Publikacja

  • J. Szantyr
  • P. Flaszyński
  • K. Tesch
  • W. Suchecki
  • S. Alabrudziński

  - Polish Maritime Research - Rok 2011

  Artykuł przedstawia eksperymentalne i numeryczne badanie kawitujacych wirów wierzchołkowych. Eksperymenty przeprowadzono w tunelu kawitacyjnym na modelu płata nośnego, wykonując pomiary pola prędkości wokół wiru przy pomocy metody Particle Image Velocimetry (PIV). Równolegle przeprowadzono numeryczne symulacje kawitującego wiru wierzchołkowego dla różnych parametrów przepływu. Symulacje wykonano programami Fluent i CFX, stosując...

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• Experimental and Numerical Study on Pounding of Structures in Series

  Publikacja

  • S. El-Khoriby
  • A. Seleemah
  • H. Elwardany
  • R. Jankowski

  - Rok 2015

  Pounding between structures in series during earthquakes may cause serious damage in the structural elements. The aim of this paper is to show the results of an experimental and numerical study that is focused on pounding between more than two structures which may be described as “structures in series”. In this study, the shaking table experiments, as well as the numerical analyses, were performed using three tower models including...

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• Communications in Nonlinear Science and Numerical Simulation

  Czasopisma

  ISSN: 1007-5704 , eISSN: 1878-7274

• A Numerical Model Study on Ice Boom in a Coastal Lake

  Publikacja

  • T. Kolerski
  • H. T. Shen
  • S. Kioka

  - JOURNAL OF COASTAL RESEARCH - Rok 2013

  A numerical study on the effectiveness of the proposed ice boom to be installed near the entrance of Lake Notoro, Hokkaido, Japan to prevent sea ice moving into the lake is presented. A two-dimensional hydro–ice dynamics model was modified to allow for the treatment of ice-boom interaction with the effect of tidal current. The numerical model is a coupled hydrodynamic and ice dynamic model. The ice dynamic component uses a Lagrangian...

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• Numerical Analysis and Applications

  Czasopisma

  ISSN: 1995-4239 , eISSN: 1995-4247

• APPLIED NUMERICAL MATHEMATICS

  Czasopisma

  ISSN: 0168-9274 , eISSN: 1873-5460

• Journal of Numerical Mathematics

  Czasopisma

  ISSN: 1570-2820 , eISSN: 1569-3953

• Journal of Numerical Cognition

  Czasopisma

  eISSN: 2363-8761

• Numerical study of lasing modes of periodically structured active nanowires

  Publikacja

  • V. Byelobrov
  • T. Benson
  • P. Sewell
  • A. Nosich

  - Rok 2008

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• Experimental study and numerical calculations in the analysis of thin-walled structures

  Publikacja

  • A. Piekarczuk
  • A. Piekarczuk

  - Rok 2017

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• Design and numerical study of turbines operating with MDM as working fluid

  Publikacja

  • P. Klonowicz
  • J. Surwiło
  • Ł. Witanowski
  • T. Suchocki
  • Z. Kozanecki
  • P. Lampart

  - Open Engineering - Rok 2015

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• Numerical Study of Concrete Mesostructure Effect on Lamb Wave Propagation

  Publikacja

  • B. Zima
  • R. Kędra

  - Materials - Rok 2020

  The article presents the results of the numerical investigation of Lamb wave propagation in concrete plates while taking into account the complex concrete mesostructure. Several concrete models with randomly distributed aggregates were generated with the use of the Monte Carlo method. The influence of aggregate ratio and particle size on dispersion curves representing Lamb wave modes was analyzed. The results obtained for heterogeneous...

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• Excavation induced cast iron pipeline failure – a numerical study

  Publikacja

  • K. Szarf
  • R. Ossowski

  - Inżynieria Morska i Geotechnika - Rok 2016

  Numerical study on impact of an unsecured excavation on an underground pipeline. Analysis focused on investigation of pipeline displacement generated by soil movement caused by excavation and heavy traffic. Numerical calculations and soil parameter sensitivity analysis based on Finite Element Method. Some comparisons of results with real-life failure cases.

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

  Publikacja

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

  - Rok 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...

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

  Publikacja

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

  - HEAT TRANSFER ENGINEERING - Rok 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...

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• A Numerical Model Study on Grasse River Ice Control Structures

  Publikacja

  • T. Kolerski
  • H. T. Shen

  - CANADIAN JOURNAL OF CIVIL ENGINEERING - Rok 2024

  Ice jams in the Grasse River have caused the erosion of capping material designed to prevent the resurfacing of the bed sediment in the PCB-contaminated area. Two in-stream ice-control structures are proposed to avoid the jam-induced erosion of the capping material. These two ice-control options are a pier-type ice-control structure and a reconstruction of a small hydropower dam upstream of the capping site. A numerical model study...

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• Experimental study and numerical simulation of the dynamic penetration into dry clay

  Publikacja

  • V. Eremeev
  • V. Balandin
  • V. Balandin
  • A. Bragov
  • A. Konstantinov
  • L. Igumnov

  - CONTINUUM MECHANICS AND THERMODYNAMICS - Rok 2023

  Tests of dry clay were carried out in a uniaxial stress state using the experimental setup which implements the split Hopkinson pressure bar method. Based on the results of these experiments, the compressive strength of clay was determined as an important element of S.S. Grigoryan’s model of the soil medium. In addition, the parameters of this model are determined from the results of experiments using the modified Kolsky method...

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• ACTA NUMERICA

  Czasopisma

  ISSN: 0962-4929 , eISSN: 1474-0508

• INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS

  Czasopisma

  ISSN: 0363-9061 , eISSN: 1096-9853

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

  Publikacja

  • B. Kaźmierski
  • Ł. J. Kapusta

  - SAE Technical Papers - Rok 2022

  The collision of two or more liquid jets may provide considerable atomisation and efficient mixing of injected substances at the same time. This phenomenon is used, among others, in rocket engines, where the fuel and oxidiser are introduced separately and almost immediately mixed through self-impingement. Depending on the injection and operating conditions, diverse configurations of impinging jets are used, such as doublets,...

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• A new insight into understanding the Crow and Champagne preferred mode: a numerical study

  Publikacja

  • A. Boguslawski
  • K. Wawrzak
  • A. Tyliszczak

  - JOURNAL OF FLUID MECHANICS - Rok 2019

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• Experimental and Numerical Study on Dynamics of Two Footbridges with Different Shapes of Girders

  Publikacja

  • A. Banaś
  • R. Jankowski

  - Applied Sciences-Basel - Rok 2020

  The paper presents the experimental and numerical results of the dynamic system identification and verification of the behavior of two footbridges in Poland. The experimental part of the study involved vibration testing under different scenarios of human-induced load, impulse load, and excitations induced by vibration exciter. Based on the results obtained, the identification of dynamic parameters of the footbridges was performed...

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• Mesh dependence study for numerical assessment of hydrodynamic characteristics of windsurfing fin

  Publikacja

  • H. Pruszko

  - Rok 2021

  The presented research aims to assess the drag coefficient and lift coefficient versus angle of attack curves for windsurfing fin. Special attention in the research was being paid to the evaluation of the stall angle value. The angle of incidence for which the stall occurs was searched, and the sensitivity of the solution for the mesh resolution was studied. The mesh resolution sensitivity analysis was done by systematically decreasing...

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• AN EXPERIMENTAL AND NUMERICAL STUDY ON THE PERFORMANCE OF AN INNOVATIVE VERTICAL-AXIS WIND TURBINE

  Publikacja

  • K. Kludzińska
  • K. Tesch
  • P. Doerffer

  - Rok 2016

  This paper introduces the innovative modification of the Savonius wind turbine being able to significantly increase efficiency in comparison with the classic design. This innovative design is equipped with a stator directing the flow. The presence of the stator increases the active surface area and generates higher torques acting on a shaft. Additionally, it makes it possible to take better advantage of wind energy and compensate...

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• A NUMERICAL STUDY ON THE DYNAMICS OF DENGUE DISEASE MODEL WITH FRACTIONAL PIECEWISE DERIVATIVE

  Publikacja

  • J. Khan
  • M. Ur Rahman
  • M. Riaz
  • J. Awrejcewicz

  - FRACTALS-COMPLEX GEOMETRY PATTERNS AND SCALING IN NATURE AND SOCIETY - Rok 2022

  The aim of this paper is to study the dynamics of Dengue disease model using a novel piecewise derivative approach in the sense of singular and non-singular kernels. The singular kernel operator is in the sense of Caputo, whereas the non-singular kernel operator is the Atangana–Baleanu Caputo operator. The existence and uniqueness of a solution with piecewise derivative are examined for the aforementioned problem. The suggested...

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• Numerical testing of numerical generation efficiency in a bubble layer

  Publikacja

  • A. Baranowska

  - Rok 2011

  Praca omawia zagadnienie nieliniowej propagacji w warstwie z pęcherzykami. Przedstawiono model matematyczny zjawiska. Omówiono problem wyznaczania prędkości fazowej, współczynnika tłumienia i częstotliwości rezonansowej pęcherzyków. Analizowano zmiany amplitud pierwszej i drugiej harmonicznych ciśnienia fali odbitej i bieżącej w funkcji grubości warstwy, względnej koncentracji pęcherzyków o różnych promieniach oraz częstotliwości...

• INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS

  Czasopisma

  ISSN: 0894-3370 , eISSN: 1099-1204

• INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN ENGINEERING

  Czasopisma

  ISSN: 0029-5981 , eISSN: 1097-0207

• Experimental and numerical study on spontaneous ignition of hydrogen and hydrogen-methane jets in air

  Publikacja

  • W. Rudy
  • A. Dabkowski
  • A. Teodorczyk

  - INTERNATIONAL JOURNAL OF HYDROGEN ENERGY - Rok 2014

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• Response of high voltage disconnector under seismic excitation - experimental and numerical study

  Publikacja

  • P. Dembowski
  • R. Jankowski

  - Rok 2011

  The efficiency of the energetic infrastructure system is a very import safety issue in the region experienced by the ground motion. The aim of the present paper is to show the results of the experimental and numerical study focused on the earthquake-induced response of the high voltage disconnector, which is an important element of energetic network. First, the impact tests as well as the sweep-sine shaking table tests were conducted....

• Particle Shape Effect on Macroscopic Behaviour of Underground Structures: Numerical and Experimental Study

  Publikacja

  • K. Szarf
  • G. Combe
  • P. Villard

  - Rok 2013

  The mechanical performance of underground flexible structures such as buried pipes or culverts made of plastics depend not only on the properties of the structure, but also the material surrounding it. Flexible drains can deflect by 30% with the joints staying tight, or even invert. Large deformations of the structure are difficult to model in the framework of Finite Element Method, but straightforward in Discrete Element Methods....

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• On Nonlinear Bending Study of a Piezo-Flexomagnetic Nanobeam Based on an Analytical-Numerical Solution

  Publikacja

  • M. Malikan
  • V. Eremeev

  - Nanomaterials - Rok 2020

  Among various magneto-elastic phenomena, flexomagnetic (FM) coupling can be defined as a dependence between strain gradient and magnetic polarization and, contrariwise, elastic strain and magnetic field gradient. This feature is a higher-order one than piezomagnetic, which is the magnetic response to strain. At the nanoscale, where large strain gradients are expected, the FM effect is significant and could be even dominant. In...

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• Effect of Flow Normalization in Micro-Pin-Finned Heat Sink: Numerical Study

  Publikacja

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

  - JOURNAL OF THERMOPHYSICS AND HEAT TRANSFER - Rok 2020

  The micro-pin-fin heat sink (MPFHS) is widely employed for the heat transfer enhancement of microchannel heat sinks. In the current paper, the effect of flow normalization on the thermohydraulic performance of micro-pin-finned heat sinks is studied numerically. Two geometries of MPFHSs, the conventional design micro-pin-fin heat sink (CD-MPFHS) with a uniform-width micro pin fin and the proposed design micro-pin-fin heat sink (PD-MPFHS)...

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• Particle Shape Effect on Macroscopic Behaviour of Underground Structures: Numerical and Experimental Study

  Publikacja

  • K. Szarf
  • G. Combe
  • P. Villard

  - Studia Geotechnica et Mechanica - Rok 2014

  Abstract: The mechanical performance of underground flexible structures such as buried pipes or culverts made of plastics depend not only on the properties of the structure, but also on the material surrounding it. Flexible drains can deflect by 30% with the joints staying tight, or even invert. Large deformations of the structure are difficult to model in the framework of Finite Element Method, but straightforward in Discrete...

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• EXPERIMENTAL AND NUMERICAL STUDY ON COLLISIONS BETWEEN STEEL STRUCTURES UNDER EARTHQUAKE EXCITATION

  Publikacja

  • B. Sołtysik
  • R. Jankowski

  - Rok 2014

  In the time of high urbanization, the need to build closely-spaced structures forces the designers to take into account earthquake-induced collisions between adjacent buildings and their effects on the response of structures. Past and recent investigations confirmed that interactions between adjacent buildings during earthquakes may cause serious damages to the structural elements and may even lead to total collapse of the structure....

• Numerical study on seismic response of a base-isolated building modelled with shell elements

  Publikacja

  • T. Falborski
  • R. Jankowski

  - Rok 2014

  Seismic isolation is counted among the most popular and effective means of protecting structures against earthquake forces. Base isolators, like Lead-Rubber Bearings (LRB), High-Damping Rubber Bearings (HDB) or Friction Pendulum Systems (FPS) are extensively used in practice in many earthquake-prone regions of the world. The present paper reports the results obtained from the numerical study on seismic response of a base-isolated...

• Experimental and Numerical Study on Mechanical Characteristics of Aluminum/Glass Fiber Composite Laminates

  Publikacja

  • M. E. Golmakani
  • T. Wiczenbach
  • M. Malikan
  • E. Z. Karimi
  • M. Masoumi
  • V. Eremeev

  - MECHANICS OF COMPOSITE MATERIALS - Rok 2023

  The fiber-metal composites made of aluminum sheets and glass fibers reinforced with a polyester resin as the matrix were studied. The composites were prepared by hand lay-up method. Some aspects of manufacturing affecting the composite behavior were considered. In particular, the influences of the arrangement of layers and their number on the mechanical and physical properties of composites with ten different compositions were...

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• Earthquake–induced pounding on response of adjacent structures in series: experimental and numerical study

  Publikacja

  • S. El-Khoriby
  • A. Seleemah
  • H. Elwardany
  • R. Jankowski

  - Rok 2015

  Pounding between structures in series during earthquakes may cause serious damage in the structur-al elements. The aim of this paper is to show the results of an experimental and numerical study that is focused on pounding between more than two structures which may be called "structures in series". In this study, the shaking table experiments, as well as the numerical analyses, were performed using three tower models including...

• Numerical study on pounding between two adjacent buildings under earthquake excitation

  Publikacja

  • H. Naderpour
  • R. Barros
  • S. M. Khatami
  • R. Jankowski

  - SHOCK AND VIBRATION - Rok 2016

  Seismic excitation, which results in large horizontal relative displacements, may cause collisions between two adjacent structures due to insufficient separation distance between them. Such collisions, known as earthquake-induced structural pounding, may induce severe damages. In this paper, the case of pounding between two adjacent buildings is studied by the application of single degree-of-freedom structural models. Impact is...

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

  Publikacja

  • P. Dąbrowski
  • R. Kumar

  - INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER - Rok 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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• Combined numerical and experimental approach to determine numerical model of abdominal scaffold

  Publikacja

  • A. Tomaszewska
  • D. Reznikov

  - COMPUTER METHODS IN BIOMECHANICS AND BIOMEDICAL ENGINEERING - Rok 2022

  A proper junction of the prosthesis and the abdominal wall is important in successful hernia repair. The number of tacks should be balanced to assure appropriate mesh fixation and not to induce post-operative pain. Numerical simulations help to find this balance. The study is aimed at creating a proper numerical model of a knitted surgical mesh subjected to boundary conditions and load occurring in the abdominal cavity. Continuous,...

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• COMMUNICATIONS IN NUMERICAL METHODS IN ENGINEERING

  Czasopisma

  ISSN: 1069-8299

• Journal of Numerical and Applied Mathematics

  Czasopisma

  ISSN: 0868-6912

• ELECTRONIC TRANSACTIONS ON NUMERICAL ANALYSIS

  Czasopisma

  ISSN: 1068-9613

• IMA JOURNAL OF NUMERICAL ANALYSIS

  Czasopisma

  ISSN: 0272-4979 , eISSN: 1464-3642

• Numerical Algebra Control and Optimization

  Czasopisma

  ISSN: 2155-3289 , eISSN: 2155-3297

• NUMERICAL FUNCTIONAL ANALYSIS AND OPTIMIZATION

  Czasopisma

  ISSN: 0163-0563 , eISSN: 1532-2467