A new preconditioner for the Oseen equations
A new preconditioner for the Oseen equations
复制标题
Oseen 方程的新预处理器
DOI:
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发表时间:
2003
期刊:
影响因子:
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通讯作者:
D. Silvester
中科院分区:
文献类型:
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作者:
A. Wathen;D. Loghin;D. Kay;H. Elman;D. Silvester
We describe a preconditioner for the linearised incompressible Navier-Stokes equations (the Oseen equations) which requires as components a preconditioner/solver for a discrete Laplacian and for a discrete advection-diffusion operator. With this preconditioner, convergence of an iterative method such as GMRES is independent of the mesh size and depends only mildly on the viscosity parameter (the inverse Reynolds number). Thus when the component preconditioner/solvers are effective on their respective subproblems (as one expects with an appropriate multigrid cycle for instance)a fast Oseen solver results.