摘要
本文采用预处理的时间推进方法,求解可压形式的Euler/Navier-Stokes方程,数值模拟低马赫数范围内的无粘、粘性流动。为了进一步加速收敛,并使用了多重网格技术。计算表明预处理能够保持可压缩求解方法在高速时的收敛特征,对于低速流动计算可以加速收敛并提高精度.
The preconditioned time-marching method was applied to solve the compressible Euler and Navier-Stokes equations, including the inviscid and viscous flows at low Mach number. And multigrid method was implemented to accelerate the convergence rate. To verify the preconditioned multigrid algorithms several cases have been tested. The numerical results demonstrated that the convergence character is preserved for high-speed flows, furthermore the convergence and quality of solution for low Mach number flows are improved.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第6期931-934,共4页
Journal of Engineering Thermophysics
关键词
预处理
多重网格
数值模拟
非定常
precondition
multigrid
numerical simulation
unsteady
