[deal.II] Re: Solving navier stokes equation gives no convergence

2023-01-27 Thread blais...@gmail.com
Can you tell us a bit more about what you have tried? For example, in the limit of low Re (say Re=0.1 or Re=1) does your non-linear solver converge? Have you tried making a manufactured solution to get your convergence order to see if everything is all fine? RE=200 can be quite heavy for

[deal.II] Re: some problems about step37

2023-01-27 Thread Peter Munch
In this tutorial, multigrid is using Chebysev sweeps around a point Jacobi solver as smoother. Latter needs the (inverse) of the diagonal. Hope this helps. Peter On Friday, January 27, 2023 at 11:07:21 AM UTC+1 13274...@163.com wrote: > hello everyone! > I am learning about the step37 and