NEAR-WAKE FLOW CALCULATIONS BY AN IMPLICIT 2D NAVIER-STOKES ROE RIEMANN SOLVER
作者:
F. ANGRAND,
F. C. LAFON,
期刊:
International Journal of Computational Fluid Dynamics
(Taylor Available online 1994)
卷期:
Volume 3,
issue 3-4
页码: 153-169
ISSN:1061-8562
年代: 1994
DOI:10.1080/10618569408904505
出版商: Taylor & Francis Group
关键词: Euler;Navier-Stokes;Remann solvers;finite volume method;supersonic flow
数据来源: Taylor
摘要:
A flux formulation using a projected 2D Roe Riemann solver on unstructured grids (R2D Solver) is introduced for solving the Navier-Stokes equations and is applied to calculations of axisymmetric laminar near-wake flows behind a spherical-conical body. The numerical framework was first developed by P. L. Roe et al, in the late eighties. They looked for unsteady solutions to Euler's equations using a rather simple but exact three state linearization on triangular grids and decomposing the solution using some effective wave models. Our approach differs from their techniques by constructing a second order accurate and conservative flux functions under the well-known classical finite volume formulation. However, our Riemann Solver is obtained by a suitable linearization procedure upon all three prescribed nodal values given on each triangle. Our numerical method is applied to a Mach 4.3 flow problem for refined unstructured triangular grid behind the body. Numerical results indicate that our technique is stable, accurate and converges successfully to a stationary solution as the cell size is reduced from the coarse lo the finest grid.
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