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Wyniki wyszukiwania dla: POST-DRYOUT, MODELLING
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Modelling of saturated, subcooled and post-dryout flow boiling with the energy dissipation based semi-empirical model
PublikacjaA comprehensive semi-empirical model for saturated, subcooled and post dryout heat transfer is presented based on considerations of energy dissipation in the flow. The fundamental hypothesis in the model is the fact that heat transfer during flow boiling can be treated as a sum of two contributions constituting the total energy dissipation in the flow, namely the energy dissipation due to the shearing flow without the bubbles and...
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Modelling of dryout process in an annular flow
PublikacjaW pracy pokazano teoretyczny model kryzysu wrzenia przy wysokich stopniach suchości, który jest modyfikacją modelu proponowanego wcześniej przez Sedlera i Mikielewicza. Model wysychania filmu cieczowego w przepływie pierścieniowym składa się z różniczkowych równań bilansu masy zapisanych dla filmu na ściance i kropel w rdzeniu przepływu. Rozwiązanie układu równań wymaga znajomości gęstości strumienia masy kropel wytrącających się...
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Modelling of dryout process in annular flow
PublikacjaW pracy pokazano teoretyczny model kryzysu wrzenia przy wysokich stopniach suchości, który jest modyfikacją modelu proponowanego wcześniej przez Sedlera i Mikielewicza. Model wysychania filmu cieczowego w przepływie pierścieniowym składa się z różniczkowych równań bilansu masy zapisanych dla filmu na ściance i kropel w rdzeniu przepływu. Rozwiązanie układu równań wymaga znajomości gęstości strumienia masy kropel wytrącających się...
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A simplified energy dissipation based model of heat transfer for post-dryout flow boiling
Publikacjamodel for post dryout mist flow heat transfer is presented based on considerations of energy dissipation in the flow. The model is an extension of authors own model developed earlier for saturated and subcooled flow boiling. In the former version of the model the heat transfer coefficient for the liquid singlephase convection as a reference was used, due to the lack of the appropriate model for heat transfer coefficient for the...
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Justyna Signerska-Rynkowska dr inż.
OsobySince 2016 assistant professor at Gdańsk University of Technology, Faculty of Applied Physics and Mathematics, Division of Differential Equations and Mathematics Applications 2021-2024 visiting assistant professor in Dioscuri Centre in Topological Data Analysis (Institute of Mathematics of the Polish Academy of Sciences, IMPAN) Since 2020 - Principal Investigator in "SONATA" grant “Challenges of low-dimensional...
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Mathematical modelling and computer simulation of activated sludge systems.Second edition
PublikacjaMathematical Modelling and Computer Simulation of Activated Sludge Systems – Second Edition, provides, from the process engineering perspective, a comprehensive and up-to-date overview regarding various aspects of the mechanistic (“white box”) modelling and simulation of advanced activated sludge systems performing biological nutrient removal. In the new edition of the book, a special focus is given to nitrogen removal and an overview...
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Combined Close Range Photogrammetry and Terrestrial Laser Scanning for Ship Hull Modelling
PublikacjaThe paper addresses the fields of combined close-range photogrammetry and terrestrial laser scanning in the light of ship modelling. The authors pointed out precision and measurement accuracy due to their possible complex application for ship hulls inventories. Due to prescribed vitality of every ship structure, it is crucial to prepare documentation to support the vessel processes. The presented methods are directed, combined...
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REVIEW OF WEATHER FORECAST SERVICES FOR SHIP ROUTING PURPOSES
PublikacjaWeather data is nowadays used in a variety of navigational and ocean engineering research problems: from the obvious ones like voyage planning and routing of sea-going vessels, through the analysis of stability-related phenomena, to detailed modelling of ships’ manoeuvrability for collision avoidance purposes. Apart from that, weather forecasts are essential for passenger cruises and fishing vessels that want to avoid the risk...
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Experimental and theoretical analysis of dryout in annular flow
PublikacjaW pracy opisano badania eksperymentalne kryzysu wrzenia typu dryout, przeprowadzone w pionowych rurkach o średnicy wewnętrznej 1.15 i 2.3 mm z wykorzystaniem dwóch czynników roboczych, tj. SES36 i R123. W oparciu o wyniki tych badań zaproponowano ogólną korelację na krytyczny strumień ciepła w minikanałach.
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Areas of updraft air motion from WRF model simulations.
Dane BadawczePresented dataset is a part of numerical modelling study focusing on the analysis of sea ice floes size distribution (FSD) influence on the horizontal and vertical structure of convection in the atmosphere. The total area and spatial arrangement of the updrafts indicates that the FSD affects the total moisture content and the values of area averaged...
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Mariusz Figurski prof. dr hab. inż.
OsobyDyrektor Centrum Modelowania Meteorologicznego Instytut Meteorologii i Gospodarki Wodnej - Państwowy Instytut Badawczy. Urodził się 27 kwietnia 1964 roku w Łasinie. Egzamin maturalny złożył w 1983 roku po ukończeniu II Liceum Ogólnokształcącego im. Jana III Sobieskiego w Grudziądzu, Studia wyższe w trybie indywidualnym ukończył w 1989 (10.07.1989) na Wydziałach Elektromechanicznym i Inżynierii Lądowej i Geodezji Wojskowej Akademii...
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Wiktoria Wojnicz dr hab. inż.
OsobyDSc in Mechanics (in the field of Biomechanics) - Lodz Univeristy of Technology, 2019 PhD in Mechanics (in the field of Biomechanics) - Lodz Univeristy of Technology, 2009 (with distinction) Publikacje z listy MNiSW (2009 - ) Wojnicz W., Wittbrodt E., Analysis of muscles' behaviour. Part I. The computational model of muscle. Acta of Bioengineering and Biomechanics, Vol. 11, No.4, 2009, p. 15-21 Wojnicz W., Wittbrodt E.,...
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Robert Bogdanowicz prof. dr hab. inż.
OsobyRobert Bogdanowicz received his Ph.D. degree with honours in Electronics from the Gdansk University of Technology. He worked as a post-doc researcher in Ernst-Moritz-Arndt-Universität Greifswald Institut für Physik. He has initiated optical emission imaging of muti-magnetron pulsed plasma and contributed to the development of antibacterial implant coatings deposited by high-power impulse magnetron sputtering. He moved back to...
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Clinical anatomy of the spatial structure of the right ventricular outflow trac
PublikacjaBackground. The right ventricular outflow tract (RVOT) is located above the supraventricular crest and reaches the level of the pulmonary valve. Detailed knowledge of the RVOT spatial structure and its morphology is extremely important for cardiac invasive therapeutic procedures. Objectives. To examine the spatial structure of the RVOT using virtual models of the right ventricle (RV) interior obtained post mortem. Material and...
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Comparative 3D DEM simulations of sand–structure interfaces with similarly shaped clumps versus spheres with contact moments.
PublikacjaThree-dimensional simulations of a monotonic quasi-static interface behaviour between initially dense cohesionless sand and a rigid wall of different roughness during tests in a parallelly guided direct shear test under constant normal stress are presented. Numerical modelling was carried out by the discrete element method (DEM) using clumps in the form of convex non-symmetric irregularly shaped grains. The clumps had an aspect...
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Experimental investigation of dryout of SES36, R134a, R123 and ethanol in vertical small diameter tubes
PublikacjaW publikacji przedstawiono wyniki badań eksperymentalnych kryzysu wrzenia typu dryout podczas wrzenia w przepływie czterech czynników (SES36, R134a, R123, alkohol etylowy) w kanałach o średnicy wewnętrznej 1.15 mm i 2.3 mm. Badania przeprowadzono w szerokim zakresie zmian stopnia suchości pary (0.65-1), gęstości strumienia masy (40-900 kg/(m2s)) i gęstości strumienia ciepła (20-220 kW/m2). W badaniach wykorzystano technikę termowizyjną...
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Determination of dryout localization using a five-equation model of annular flow for boiling in minichannels
PublikacjaDetailed studies have suggested that the critical heat flux in the form of dryout in minichannels occurs when the combined effects of entrainment, deposition, and evaporation of the film make the film flow rate go gradually and smoothly to zero. Most approaches so far used the mass balance equation for the liquid film with appropriate formulations for the rate of deposition and entrainment respectively. It must be acknowledged...
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Torsional buckling and post-buckling of columns made of aluminium alloy
PublikacjaThe paper concerns torsional buckling and the initial post-buckling of axially compressed thin-walled aluminium alloy columns with bisymmetrical cross-section. It is assumed that the column material behaviour is described by the Ramberg–Osgood constitutive equation in non-linear elastic range. The stationary total energy principle is used to derive the governing non-linear differential equation. An approximate solution of the equation...
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Dryout in annular flow - theoretical analysis
PublikacjaW pracy zaprezentowano model kryzysu wrzenia w przepływie pierścieniowym, obowiązujący dla wysokich wartości stopnia suchości i stanowiący modyfikację wcześniejszej wersji modelu zaproponowanego przez Sedlera i Mikielewicza. Model ten uwzględnia bilans masy w filmie cieczowym i bilans masy dla kropel cieczy w rdzeniu przepływu oraz zawiera dodatkowy człon odpowiedzialny za odparowanie filmu na ściance kanału. Rozwiązanie układu...
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Abu Al Hassan
OsobyI have completed B.Sc Industrial and Manufacturing Engineering in 2017 from University of Engineering and Technology Lahore, Pakistan. In 2017 Chinese Govt Offered me Fully fundded scholarship and completed MEng Mechanical Engineering from Northwestern Polytechnical University Xi'an, China. There I graduated with an honor of Excellent Post Graduate Student of Year 2020. My research interests includes, Additive Manufacturing, Machining...
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Knowledge management driven leadership, culture and innovation success – an integrative model
PublikacjaPurpose – This article examines the relation between knowledge management (KM) driven leadership, culture and innovation success of knowledge-intensive small and medium sized companies. By building on the previously reported research on leadership, culture, innovation, and knowledge management, we synergistically integrated KM-driven leadership and innovation success while exploring the meditational role of culture in that. Design/methodology/approach...
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APPLIED MATHEMATICAL MODELLING
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Feminist Lens on Gender Roles in Entrepreneurial Intention and Implementation
PublikacjaBased on Social Feminist Theory, Post-Structural Feminism and Gender-Role Orientation (GRO) (masculinity, femininity and androgyny), the aim of this research is to study the entrepreneurial process through the lenses of both biological sex and socially constructed gender, in order to disentangle their effects and to shed new light on the process. Secondly, we aim to push forward the research on the early-stage entrepreneurial process...
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Shaping the spatial structures of post-socialist cities
PublikacjaThis paper deals with issues and problems associated with transformation of spatial structures of post-socialist cities. The special attention is paid to the cases of Polish cities and towns and the analysis of their evolution – from the “post-communist structures” to the “cities in the age of globalization”. In the light of this the factors influencing the spatial transformation of these are analyzed. The paper is concluded with...
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On instabilities and post-buckling of piezomagnetic and flexomagnetic nanostructures
PublikacjaWe focus on the mechanical strength of piezomagnetic beam-like nanosize sensors during post-buckling. An effective flexomagnetic property is also taken into account. The modelled sensor is selected to be a Euler-Bernoulli type beam. Long-range interactions between atoms result in a mathematical model based on the nonlocal strain gradient elasticity approach (NSGT). Due to possible large deformations within a post-buckling phenomenon,...
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ECONOMIC MODELLING
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Experimental and theoretical study of dryout in annular flow in small diameter channels
PublikacjaW pracy zaprezentowano badania eksperymentalne kryzysu wrzenia II rodzaju w kanałach o małej średnicy. Badania prowadzone były w rurach pionowych o średnicy 1.15 i 2.3 mm, w których badanym czynnikiem były płyny niskowrzące, takie jak SES36 i R123. W badaniach zastosowano nowoczesne techniki pomiarowe do określania lokalizacji kryzysu wrzenia na ściance kanału, np. kamerę termowizyjną. Na podstawie pozyskanych punktów eksperymentalnych...
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EVENTS VISUALIZATION POST IN A DISTRIBUTED TELEINFORMATION SYSTEM FOR THE BORDER GUARD
PublikacjaEvents Visualization Post is a part of the STRADAR project, which is dedicated to streaming real-time data in distributed dispatcher and teleinformation systems of the Border Guard. Events Visualization Post is a software designed for simultaneous visualization of data of different types. In the paper, the structure of the software is presented, the process of generation of tasks is described, and the visualization of audio, files,...
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Flexural buckling and post-buckling of columns made of aluminium alloy
PublikacjaThe paper concerns flexural buckling and initial post-buckling of axially compressed columns made of aluminium alloy described by the Ramberg-Osgood relationship. The non-linear differential equation of the problem is derived using the stationary total energy principle and the assumptions of classical beam theory within a finite range. The approximate analytical solution of the equation leading to the buckling loads and initial...
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Business process modelling
Kursy Online -
Business process modelling
Kursy OnlineWelcome to the Business Process Modeling course! We will travel together among the business processes world and its modeling with the BPMN ;) I hope it will be valuable for your future. See you soon, Marzena Grzesiak
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Urban space recovery. Landscape-beneficial solutions in new estates built in post-industrial and post-military areas in Bristol, Poznań and Gdańsk
PublikacjaThe limitation of territorial expansion and the implementation of the idea of a compact city are generally accepted paradigms of spatial development of contemporary cities. In consequence, actions are taken to improve the quality of city landscape and revitalise vacant areas. This study approaches the process of city regeneration as transformation and supplementation of the existing urban structure as well as creation of multifunctional, structurally,...
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Experimental and theoretical study of flow boiling and dryout phenomenon of ethanol in vertical minitubes
PublikacjaW ramach przeprowadzonych prac zaadoptowano istniejące stanowisko do badań laminarnej konwekcji wymuszonej, wrzenia w przepływie oraz wysychania filmu cieczy na ściance kanału wykorzystując etanol jako płyn roboczy. Przeprowadzono systematyczne badania wrzenia w przepływie dla dwóch średnic rur, tj. 1.15mm i 2.3mm. W badaniach wykorzystano najnowsze osiągnięcia z zakresu technik termowizyjnych celem znalezienia dokładnej lokalizacji...
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Integrated membrane bioreactors modelling: A review on new comprehensive modelling framework
PublikacjaIntegrated Membrane Bioreactor (MBR) models, combination of biological and physical models, have been representing powerful tools for the accomplishment of high environmental sustainability. This paper, produced by the International Water Association (IWA) Task Group on Membrane Modelling and Control, reviews the state-of-the-art, identifying gaps for future researches, and proposes a new integrated MBR modelling framework. In...
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The Efficiency of Post‐Communist Countries’ Health Systems
PublikacjaHealth‐care costs are a major financial burden for the transition economies, which have experienced rapidly increasing demand for health‐care services. The former communist countries of the Central and Eastern Europe and Central Asia needed to reform the financing of their health‐care systems and make efforts to strengthen the role of primary care while limiting the role of hospital care. The growing health needs and, consequently,...
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Suburbanizacja w procesie rozwoju miasta post-socjalistycznego
PublikacjaArtykuł dotyczy miejsca procesów suburbanizacyjnych w przekształceniach miasta post-socjalistycznego. Omówiono w nim m.in. różne aspekty i rodzaje procesów suburbanizacyjnych, w tym na tle specyficznych uwarunkowań rozwojowych miasta polskiego. W artykule zawarto także refleksje na temat zagrożeń dla przestrzeni polskich miast wiążących się z procesem suburbanizacji.
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Cavitation and Solid-State Post-Condensation of Polyethylene Terephthalate: Literature Review
PublikacjaPolyethylene terephthalate (PET) is widely used in bottle production by stretch blow molding processes (SBM processes) due to its cost-effectiveness and low environmental impact. The presented literature review focuses on microcavitation and solid-state post-condensation effects that occur during the deformation of PET in the SBM process. The literature review describes cavitation and microcavitation effects in PET material and...
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JOURNAL OF MOLECULAR GRAPHICS & MODELLING
Czasopisma -
ARRIERE-GARDE IN ARCHITECTURE, AS A RESPONSE TO POST-POSTMODERN REALITY
PublikacjaThe article presents a general discussion on the direction of contemporary architecture. We can freely speak that postmodernity, understood in its philosophical core as a search for meaning in architecture, as a strategy of building our environment is over. What comes next? Some say, from lack of better naming, that we live in post-postmodern times. Term post-postmodernity is a call for new strategy of shaping our societies and...
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Abual Hassan Mr.
OsobyI have completed my B.Sc in Industrial and Manufacturing Engineering in 2017 from the University of Engineering and Technology in Lahore, Pakistan. In 2017 Chinese Govt Offered me a Fully funded scholarship and completed my MEng in Mechanical Engineering from Northwestern Polytechnical University Xi'an, China. There I graduated with the honor of Excellent Post-Graduate Student of the Year 2020. My research interests include Additive...
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Sustainable utilization of copper post-flotation waste in cement composites
PublikacjaThe current way of managing the copper ore flotation waste is by placing it in waste neutralization facilities. However, flotation waste has great potential in application in cement composites. The article presents the detailed characteristics of post-flotation waste (PFW) and three types of cements: CEM I, CEM II/B-V, and CEM III/A, 42.5 MPa class. The post-flotation waste added for 20% of the cement mass increase the water demand...
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ESAIM-MATHEMATICAL MODELLING AND NUMERICAL ANALYSIS-MODELISATION MATHEMATIQUE ET ANALYSE NUMERIQUE
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Inteligentne rozwiązania z zakresu post-processingu dla drukowanych elementów
PublikacjaCoraz większe zainteresowanie i wykorzystywanie drukowanych elementów w różnych gałęziach przemysłu wiąże się ze stosowaniem odpowiednich metod ich obróbki wykańczającej tzw. post-processing. Tego typu metody służą zazwyczaj poprawie ogólnego wyglądu wydruków, a także ich właściwości mechanicznych i eksploatacyjnych. Celem niniejszego artykułu jest zaprezentowanie wybranych i nowoczesnych rozwiązań z zakresu post-processingu na...
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Experimental study of the post tensioned prestressed concrete corbels
PublikacjaThe results of experimental investigation of 6 symmetrical double prestressed corbels of variable shear span to depth ratio and variable location of prestressing bars are presented in the paper. The post ten- sioned corbels were prestressed with Macalloy 1030 bars of 25 mm in diameter. The results of the tests were compared with the cracking and load carrying capacity of corbels reinforced with passive reinforce- ment. As a result...
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Post-Colonial Text
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Post-Medieval Archaeology
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Post-Medieval Archaeology
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Post reproductive health
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Punk and Post-Punk
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POST-SOVIET AFFAIRS
Czasopisma