Temat: computational solid dynamics

Skocz do pozycji: 1.

Tytuł:: Fluid solid interactions – a novelty in industrial applications
Autorzy:: Ochrymiuk, Tomasz
Banaszkiewicz, Mariusz
Lemański, Marcin
Kowalczyk, Tomasz
Ziółkowski, Piotr J.
Hyrzyński, Rafał
Stajnke, Michał
Bryk, Mateusz
Kraszewski, Bartosz
Kruk-Gotzman, Sylwia
Froissart, Marcin
Badur, Janusz
Tematy:: computational fluid dynamics
computational solid dynamics
arbitrary agrangian eulerian description
fluid-solid interaction
micromechanics
nanomechanics; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/2091370.pdf Link otwiera się w nowym oknie
Opis:: The article deals with a current state-of-art of fluid solid interaction (FSI) – the new branch of continuum physics. Fluid-solid interaction is a new quality of modeling physical processes of continuum mechanics, it can be described as the interaction of various (so far treated separately from the point of view of mathematical modeling) physical phenomena occurring in continuous media systems. The most correct is the simultaneous application of the laws of the given physical disciplines, which implies that fluid solid interaction is a subset of multi-physical applications where the interactions between these subsets are exchanged on the surface in interconnected systems. Our purpose is to extend the fluid solid interaction aplications into new phenomena what follow from the industrial needs and inovative thechnologies. Selecting the various approaches, we prefer the arbitraty lagrangean-eulerian description within the bulk of fluid/solid domain and a new sort of advanced boundary condition on a surface of common contact.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Introduction to non-linear Thermal-FSI on the example of transient load of a thin-walled container
Autorzy:: Kraszewski, B.
Tematy:: thermal-FSI
CFD
computational fluid dynamics
CSD
computational solid dynamics
non-linear mechanics; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1818166.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the problems associated with the transient thermal load of structures exhibiting a non-linear relationship between load and strain. The mathematical model required to comprehensively describe the relationship between fluid and solid has been shown from different perspectives. In addition, the Newton-Raphson method has been referred to as a way of solving nonlinear equations. The article also presents the assumptions and results of numerical analysis of thin-walled container thermally loaded by contact with hot water. The conclusions drawn emphasize the importance of Thermal-FSI tools, especially in the power engineering sector.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: CFD Study of Base Drag of the Grot Rocket
Autorzy:: Sahbon, Nezar
Michałów, Maciej
Murpani, Siddharth
Żurawka, Paulina
Kaczmarek, Kacper
Tematy:: base drag
computational fluid dynamics
rocket aerodynamics
sounding rockets
solid rocket propulsion; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Powiązania:: https://bibliotekanauki.pl/articles/36822389.pdf Link otwiera się w nowym oknie
Opis:: Propulsion system operation is known to affect the aerodynamic characteristics of rockets. Specifically, the net axial force acting on a rocket in flight cannot be precisely obtained by combining the static thrust with drag values computed for a rocket with an inactive motor. One of the main reasons for this is the influence of motor operation on pressure at the base of the rocket. The aim of this paper is to investigate the effect of motor operation on the aerodynamic parameters of the Grot sounding rocket developed by the Students’ Space Association, Warsaw University of Technology. The study consists of two series of axisymmetrical computational fluid dynamic simulations of flow around the rocket - one with the motor being non-operational and the other with active thrust. In the post-processing phase, the axial force acting on various components of the rocket is computed, with an emphasis on the base and nozzle exit sections. Quantitative and qualitative differences between the cases with and without active thrust are highlighted and discussed. The obtained results are compared to a semi-empirical model found in the literature. Finally, a semi-empirical base drag model is proposed for use in Grot flight simulation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Quantification of the Radiative and Convective Heat Transfer Processes and their Effect on mSOFC by CFD Modelling
Autorzy:: Pianko-Oprych, P.
Kasilova, E.
Jaworski, Z.
Tematy:: microtubular Solid Oxide Fuel Cell stack
heat transfer
computational fluid dynamics (CFD)
temperature distributions; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/778685.pdf Link otwiera się w nowym oknie
Opis:: The CFD modelling of heat transfer in a microtubular Solid Oxide Fuel Cell (mSOFC) stack has been presented. Stack performance predictions were based on a 16 anode-supported microtubular SOFCs sub-stack, which is a component of the overall stack containing 64 fuel cells. Both radiative and convective heat transfer were taken into account in the modelling. The heat flux value corresponded to the cell voltage of 0.7 [V]. Two different cases of the inlet air velocity of 2.0 and 8.5 [ms^–1] were considered. It was found that radiation accounted for about 20–30 [%] of the total heat flux from the active tube surface, which means that the convective heat transfer predominated over the radiative one.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Simulation of the steady-state behaviour of a new design of a single planar Solid Oxide Fuel Cell
Autorzy:: Pianko-Oprych, P.
Zinko, T.
Jaworski, Z.
Tematy:: planar Solid Oxide Fuel Cell stack
computational fluid dynamics (CFD)
voltage-current
characteristics
temperature distributions; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/778012.pdf Link otwiera się w nowym oknie
Opis:: The aim of the work was to develop a mathematical model for computing the steady-state voltage – current characteristics of a planar Solid Oxide Fuel Cell and to determine the performance of a new SOFC design. The design involves cross-flow bipolar plates. Each of the bipolar plates has an air channel system on one side and a fuel channel system on the other side. The proposed model was developed using the ANSYS-Fluent commercial Computational Fluid Dynamics (CFD) software supported by additional Fuel Cell module. The results confirm that the model can well simulate the diagonal current path. The effects of temperature and gas flow through the channels and a Membrane Electrode Assembly (MEA) structure were taken into account. It was shown that a significant increase of the MEA temperature at high current density can lead to hot spots formation and hence electrode damage.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Computational Fluid Dynamics calculation of a planar solid oxide fuel cell design running on syngas
Autorzy:: Pianko-Oprych, P.
Zinko, T.
Jaworski, Z.
Tematy:: planar Solid Oxide Fuel Cells
Computational Fluid Dynamics
syngas
płaskie ogniwa paliwowe z tlenkiem stałym
obliczeniowa dynamika płynów
syngaz; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/184992.pdf Link otwiera się w nowym oknie
Opis:: The present study deals with modelling and validation of a planar Solid Oxide Fuel Cell (SOFC) design fuelled by gas mixture of partially pre-reformed methane. A 3D model was developed using the ANSYS Fluent Computational Fluid Dynamics (CFD) tool that was supported by an additional Fuel Cell Tools module. The governing equations for momentum, heat, gas species, ion and electron transport were implemented and coupled to kinetics describing the electrochemical and reforming reactions. In the model, the Water Gas Shift reaction in a porous anode layer was included. Electrochemical oxidation of hydrogen and carbon monoxide fuels were both considered. The developed model enabled to predict the distributions of temperature, current density and gas flow in the fuel cell.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: CFD Analysis of Heat Transfer in a Microtubular Solid Oxide Fuel Cell Stack
Autorzy:: Pianko-Oprych, P.
Kasilova, E.
Jaworski, Z.
Tematy:: przenikanie ciepła
strata ciepła
rozkład temperatur
microtubular Solid Oxide Fuel Cell stack
heat transfer
heat losses
temperature distributions
computational fluid dynamics (CFD); Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/185553.pdf Link otwiera się w nowym oknie
Opis:: The aim of this work was to achieve a deeper understanding of the heat transfer in a microtubular Solid Oxide Fuel Cell (mSOFC) stack based on the results obtained by means of a Computational Fluid Dynamics tool. Stack performance predictions were based on simulations for a 16 anodesupported mSOFCs sub-stack, which was a component of the overall stack containing 64 fuel cells. The emphasis of the paper was put on steadystate modelling, which enabled identification of heat transfer between the fuel cells and air flow cooling the stack and estimation of the influence of stack heat losses. Analysis of processes for different heat losses and the impact of the mSOFC reaction heat flux profile on the temperature distribution in the mSOFC stack were carried out. Both radiative and convective heat transfer were taken into account in the analysis. Two different levels of the inlet air velocity and three different values of the heat losses were considered. Good agreement of the CFD model results with experimental data allowed to predict the operation trends, which will be a reliable tool for optimisation of the working setup and ensure sufficient cooling of the mSOFC stack.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Three-dimensional modelling of thermal stresses in a planar solid oxide fuel cell of a novel design
Modelowanie 3D termicznych naprężeń w płaskim stałotlenkowym ogniwie paliwowym o nowatorskiej konstrukcji
Autorzy:: Zinko, T.
Pianko-Oprych, P.
Jaworski, Z.
Tematy:: planar Solid Oxide Fuel Cell
thermal stresses
residual stresses
finite element method
computational fluid dynamics (CFD)
płaskie stałotlenkowe ogniwo paliwowe
naprężenie termiczne
naprężenie szczątkowe
Metoda Elementu Skończonego
Numeryczna Mechanika Płynów; Pokaż więcej
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Powiązania:: https://bibliotekanauki.pl/articles/408754.pdf Link otwiera się w nowym oknie
Opis:: The presented modelling investigation was carried out to analyze thermal stresses and expansion in an anode supported planar Solid Oxide Fuel Cell (pSOFC). The temperature distribution was based on previously developed thermo-electrochemical model predicting fuel cell operation. The design of a single pSOFC consisted of three ceramic layers of membrane electrode assembly: anode, electrolyte, cathode and two cross-flow bipolar plates with 26 ribs. The gases flowed diagonally from one cell corner to the opposite one. The fuel and air flows were cross-wise opposed on each bipolar plate side. The study allowed to indicate the most vulnerable to thermal damage area of the fuel cell in the operating conditions. The results will be useful in further design modification and performance optimization of the SOFC.
Przeprowadzone symulacje numeryczne miały na celu analizę termicznych naprężeń i ocenę stopnia wydłużenia płaskiego stałotlenkowego ogniwa paliwowego typu pSOFC (ang. planar Solid Oxide Fuel Cell). Rozkład temperatury w ogniwie wyznaczono w oparciu o wcześniej opracowany model termiczno-elektrochemiczny [11]. Nowatorskie rozwiązanie ogniwa typu pSOFC objęło ceramiczną konstrukcję, w skład której weszły porowate elektrody – anoda i katoda, elektrolit oraz dwie płytki bipolarne z 26-cioma żebrami. Przepływ paliwa i powietrza odbywał się krzyżowo i przeciwprądowo, po przekątnej ogniwa. Wyniki symulacji pozwoliły na określenie obszarów ogniwa narażonych na uszkodzenie w wyniku wysokich wartości naprężeń termicznych. Uzyskane rezultaty FEM umożliwią dalszą modyfikację konstrukcji płaskiego ogniwa w celu optymalizacji wydajności pSOFC.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: A review of the numerical studies on planar and tubular solid oxide fuel cells within four EU projects of the 7th framework programme
Autorzy:: Pianko-Oprych, P.
Jaworski, Z.
Zinko, T.
Palus, M.
Tematy:: Solid Oxide Fuel Cell
stack
fuel cell system
Computational Fluid Dynamics
CFD
Finite Element Method
FEM
modelling
process simulation
ogniwo paliwowe z tlenkiem stałym
system ogniw paliwowych
obliczeniowa dynamika płynów
metoda elementów skończonych
MES
modelowanie symulacje procesu; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/185086.pdf Link otwiera się w nowym oknie
Opis:: The paper addresses the issues of quantification and understanding of Solid Oxide Fuel Cells (SOFC) based on numerical modelling carried out under four European, EU, research projects from the 7FP within the Fuel Cell and Hydrogen Joint Undertaking, FCH JU, activities. It is a short review of the main projects’ achievements. The goal was to develop numerical analyses at a single cell and stack level. This information was integrated into a system model that was capable of predicting fuel cell phenomena and their effect on the system behaviour. Numerical results were analysed and favourably compared to experimental results obtained from the project partners. At the single SOFC level, a static model of the SOFC cell was developed to calculate output voltage and current density as functions of fuel utilisation, operational pressure and temperature. At the stack level, by improving fuel cell configuration inside the stack and optimising the operation conditions, thermal stresses were decreased and the lifetime of fuel cell systems increased. At the system level, different layouts have been evaluated at the steady-state and by dynamic simulations. Results showed that increasing the operation temperature and pressure improves the overall performance, while changes of the inlet gas compositions improve fuel cell performance.
Dostawca treści:: Biblioteka Nauki

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