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Tytuł pozycji:

Numerical Simulation of Compressible Gas Flows Using Regularized Gas Dynamic Equations Solver QGDFoam.

Tytuł :
Numerical Simulation of Compressible Gas Flows Using Regularized Gas Dynamic Equations Solver QGDFoam.
Autorzy :
Kraposhin, M. V.
Elizarova, T. G.
Istomina, M. A.
Ryazanov, D. A.
Vatutin, K. A.
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Źródło :
AIP Conference Proceedings; 2018, Vol. 2036 Issue 1, p030105-1-030105-12, 12p
The work presents results of the application of a new OpenFOAM® solver QGDFoam for the numerical simulation of viscous compressible flows in a wide range of Mach numbers. The new solver is based on the explicit approximation of regularized, or quasi-gas dynamic (QGD) equations. The mixed finite-volume and finite-difference approximation is constructed on unstructured spatial grids with co-located variables storage. The solver has been tested for a number of 1D Riemann problems (Sod's problem, Noh test and others) and 2D cases (Mach 3 forward step, Ladenburg supersonic jet flow with Mach reflection, NASA Langley supersonic overexpanded jet flow and subsonic laminar flow over a backward-facing step). Results of numerical simulations were compared with analytic solutions and OpenFOAM® implementation of the Kurganov-Tadmor scheme, known as rhoCentralFoam. The testing procedure has shown that whereas QGD algorithm is more diffusive than Godunov-type methods with 2nd order TVD schemes with limiters, it is far less diffusive compared with pure upwind schemes as HLL. It was shown that OpenFOAM® implementation of the QGD algorithm allows to compute successfully subsonic, sonic and supersonic flows, while other OpenFOAM® solvers have a very limited operational Mach number range. Preliminary results of QGDFoam application for large-scale 3D problems are presented. Scaling tests for up to 768 cores showed good scalability of QGDFoam solver. [ABSTRACT FROM AUTHOR]
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