solidot新版网站常见问题,请点击这里查看。
消息
本文已被查看15524次
An AMG saddle point preconditioner with application to mixed Poisson problems on adaptive quad/cube meshes. (arXiv:1901.05830v1 [math.NA])
来源于:arXiv
We investigate various block preconditioners for a low-order Raviart-Thomas
discretization of the mixed Poisson problem on adaptive quadrilateral meshes.
In addition to standard diagonal and Schur complement preconditioners, we
present a dedicated AMG solver for saddle point problems (SPAMG). A key element
is a stabilized prolongation operator that couples the flux and scalar
components. Our numerical experiments in 2D and 3D show that the SPAMG
preconditioner displays nearly mesh-independent iteration counts for adaptive
meshes and heterogeneous coefficients. 查看全文>>