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Wyszukujesz frazę "grid method" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Simulations of the water freezing process: numerical benchmarks
Autorzy:
Michałek, T.
Kowalewski, T. A.
Powiązania:
https://bibliotekanauki.pl/articles/1955733.pdf
Data publikacji:
2003
Wydawca:
Politechnika Gdańska
Tematy:
numerical simulation
numerical benchmarks
finite volume method
fixed grid enthalpyporosity method
volume of fluid
solidification
free surface flow
Opis:
Three numerical benchmarks concerning the freezing of water in small enclosures are analysed using the commercial FLUENT code. The first case is a steady-state natural convection in a differentially heated cavity for temperatures near the freezing point. In the second case, the freezing of water in a differentially heated cavity is simulated. The third case describes a simulation of freezing water in the presence of forced convection and a free surface flow. Two finite-differences numerical codes are used to verify results of the FLUENT simulations for the natural convection and solidification in the differentially heated cavity. It is found that the simulation of water solidification requires very fine meshes and short time steps, extending the computational time to the extreme.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2003, 7, 3; 389-408
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of water flow in double-porosity soils on unstructured grids with the finite-volume method
Autorzy:
Szymkiewicz, A.
Burzyński, K.
Powiązania:
https://bibliotekanauki.pl/articles/1933157.pdf
Data publikacji:
2007
Wydawca:
Politechnika Gdańska
Tematy:
double-porosity soils
Richards' equation
unsaturated zone
finite volume method
unstructured grid
Opis:
Double-porosity soils consist of two interacting porous systems corresponding to weakly conductive aggregates and highly conductive inter-aggregate regions. The flow of water in such media can be described with a two-scale model obtained by homogenization. The model consists of a single macroscopic equation for the flow in the highly conductive porous system coupled with a number of micro-scale equations for the flow in the weakly conductive aggregates. In this paper we present a numerical algorithm to solve the resulting system of equations for the case of macroscopically two-dimensional flow. It is based on the finite volume approach for unstructured grid of triangular cells. Special attention is paid to the coupling of the micro- and macro-scale equations. An exemplary calculation is presented, concerning infiltration and redistribution of water in a hill-slope of double-porosity structure with cubic aggregates.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2007, 11, 4; 397-410
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical solutions of a steady 2-D incompressible flow in a rectangular domain with wall slip boundary conditions using the finite volume method
Autorzy:
Ambethkar, V.
Srivastava, M. K.
Powiązania:
https://bibliotekanauki.pl/articles/973635.pdf
Data publikacji:
2017
Wydawca:
Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:
finite volume method
numerical solutions
pressure
Reynolds number
SIMPLE algorithm
staggered grid
u-velocity
v-velocity
przepływy cieczy
metoda objętości skończonej
metody numeryczne
liczba Reynoldsa
algorytm SIMPLE
metoda siatek przesuniętych
Opis:
In this study, a finite volume method (FVM) is suitably used for solving the problem of a fully coupled fluid flow in a rectangular domain with slip boundary conditions. Numerical solutions for the flow variables, viz. velocity, and pressure have been computed. The FVM, with an upwind scheme, has been implemented to discretize the governing equations of the present problem. The well known SIMPLE algorithm is employed for pressure-velocity coupling. This was executed with the aid of a computer program developed and run in a C-compiler. Computations have been performed for unknown variables with Reynolds numbers (Re) = 50, 100, 250, 500, 750 and 1000. The behavior of steady-state solutions of velocity and pressure of the fluid along horizontal and vertical through geometric center of the rectangular domain have been illustrated. We observed that, with the increase of the Reynolds number, the absolute value of velocity components decreases whereas the pressure value increases.
Źródło:
Journal of Applied Mathematics and Computational Mechanics; 2017, 16, 2; 5-16
2299-9965
Pojawia się w:
Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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