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:
--
复制
发表时间:
2003
期刊:
影响因子:
--
通讯作者:
D. Silvester
D. Silvester
中科院分区:
--
文献类型:
--
作者:
A. Wathen;D. Loghin;D. Kay;H. Elman;D. Silvester

文献摘要

被引文献

相似文献

我们描述了线性化不可压缩纳维-斯托克斯方程(Oseen 方程)的预条件子,它需要一个用于离散拉普拉斯算子和离散平流扩散算子的预条件子/求解器作为组件。使用此预处理器,迭代方法(例如 GMRES)的收敛与网格尺寸无关,并且仅轻微依赖于粘度参数(雷诺数倒数)。因此,当组件预处理器/求解器对各自的子问题有效时(例如,正如人们对适当的多重网格循环所期望的那样),就会产生快速的 Oseen 求解器。
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.