Hello everyone, Since I am dealing with a fluid-structure interaction system using a fully coupled approach. Degrees of freedom are displacement and pressure. The Jacobian matrix is block-wise and has the following form： [ K Q ] [ Q(T) H ] where K is the stiffness matrix and has a large condition number. This is a symmetric matrix, but not guaranteed to be positive definite。
Because the matrix is relatively large, it is hoped that an iterative solver can be used. I tried conjugate gradient, GMRES and AMG methods.All of these are difficult to converge. I can't find literature that discusses solvers for related problems. So my question is what solver would be more suitable for my case？ In addition, is there some special solver or special preprocessing method for block matrix？ -- The deal.II project is located at http://www.dealii.org/ For mailing list/forum options, see https://groups.google.com/d/forum/dealii?hl=en --- You received this message because you are subscribed to the Google Groups "deal.II User Group" group. To unsubscribe from this group and stop receiving emails from it, send an email to dealii+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/dealii/7aaa5cc6-e506-4043-b7ea-7939803d0108n%40googlegroups.com.
