Am Montag, 28. Januar 2019 15:19:36 UTC+1 schrieb Wolfgang Bangerth: > > On 1/28/19 6:38 AM, [email protected] <javascript:> wrote: > > > > But the problem is, that after one mesh-refinement step the time-step > solving > > of the Navierstokesprojection (in Step-35 it is in diffusion_step()) > > diverges. And I don't see why. Does anyone have an idea? > > > > First I thought that I used the Boundary conditions in a wrong way > during te > > refinement step, > > but the problem also comes up when I apply zero Boundary values on the > whole > > domain for > > the velocity u. > > How do you choose the timestep? Are you making sure that it satisfies a > CFL > condition? > > Best > W. > > -- > ------------------------------------------------------------------------ > Wolfgang Bangerth email: [email protected] > <javascript:> > www: http://www.math.colostate.edu/~bangerth/ >
I already implemented a time-step-function to satisfy the CFL condition. The problem also comes up when I use global refinement in the refine_mesh step (for example in stead of KellyEstimator refinement). But when apply global refinement at the start of the program everything works fine, so I think there is a slight error somewhere, which I dont see. Regards Gabriel -- 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 [email protected]. For more options, visit https://groups.google.com/d/optout.
