Numerical flux functions for Reynolds‐averaged Navier–Stokes and kω turbulence model computations with a line‐preconditioned p‐multigrid discontinuous Galerkin solver
Numerical flux functions for Reynolds‐averaged Navier–Stokes and kω turbulence model computations with a line‐preconditioned p‐multigrid discontinuous Galerkin solver
复制标题
使用线预处理 pâmultigrid 不连续 Galerkin 求解器进行雷诺平均纳维斯托克斯和 kÏ 湍流模型计算的数值通量函数
DOI:
10.1002/fld.3702
复制
发表时间:
2013
影响因子:
1.8
通讯作者:
M. Lange-Hegermann
中科院分区:
文献类型:
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作者:
M. Wallraff;T. Leicht;M. Lange-Hegermann
We present an eigen‐decomposition of the quasi‐linear convective flux formulation of the completely coupled Reynolds‐averaged Navier–Stokes andkωturbulence model equations. Based on these results, we formulate different approximate Riemann solvers that can be used as numerical flux functions in a DG discretization. The effect of the different strategies on the solution accuracy is investigated with numerical examples. The actual computations are performed using ap‐multigrid algorithm. To this end, we formulate a framework with a backward‐Euler smoother in which the linear systems are solved with a general preconditioned Krylov method. We present matrix‐free implementations and memory‐lean line‐Jacobi preconditioners and compare the effects of some parameter choices. In particular,p‐multigrid is found to be less efficient than might be expected from recent findings by other authors. This might be due to the consideration of turbulent flow. Copyright © 2012 John Wiley & Sons, Ltd.
DOI:
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发表时间:
2012
期刊:
影响因子:
--
作者:
S. Langer
通讯作者:
S. Langer
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
S. Langer
通讯作者:
S. Langer
影响因子:
4.1
作者:
ROE, PL
通讯作者:
ROE, PL