Re: [deal.II] Re: Replacement of FE_Q with FE_Bernstein fails

On 1/17/19 12:43 AM, 'Maxi Miller' via deal.II User Group wrote: > For convergence tests I wanted to replace the commonly used elements FE_Q > with > FE_Bernstein. Unfortunately apparently it is not possible to simply replace > all occurences. When running my program, I get the following error:

Re: [deal.II] How to implement GridGenerator::channel_with_cylinder?

Dear Nick, Great, thanks for being willing to add this feature! To get you started, here are some guidelines as to how to use git to create a feature branch and make a pull request to the deal.II github repository. https://github.com/dealii/dealii/wiki/Contributing

[deal.II] Re: Replacement of FE_Q with FE_Bernstein fails

Update: It looks as if this issue: https://github.com/dealii/dealii/issues/2237 might be related to the currently occuring problem? Am Donnerstag, 17. Januar 2019 08:42:01 UTC+1 schrieb Maxi Miller: > > For convergence tests I wanted to replace the commonly used elements FE_Q > with

[deal.II] Replacement of FE_Q with FE_Bernstein fails

For convergence tests I wanted to replace the commonly used elements FE_Q with FE_Bernstein. Unfortunately apparently it is not possible to simply replace all occurences. When running my program, I get the following error: An error

Re: [deal.II] How to implement GridGenerator::channel_with_cylinder?

Thank you David, Thank you Jean-Paul for the hints. Fro the contribution of such functionality, I will be glad to contribute and will really appreciate your help. Nick. On Wednesday, January 16, 2019 at 11:52:09 AM UTC-5, Jean-Paul Pelteret wrote: > > Dear Nick, > > Indeed, it would be quite

Re: [deal.II] Re: Problem with Block Preconditioner and Fully Periodic Boundary Conditions

On 1/16/19 10:19 AM, ntets...@berkeley.edu wrote: > > thanks for the reply. I'm working on Immersed Boundary Method and flagella > swimming, and, more specifically, I'm trying to model a unit square domain, > which is infinitely replicated in two dimensions, governed by the > incompressible

Re: [deal.II] apply Pouseuille BC at multiple inlets with different velocity magnitudes

Thanks very much, Jean-Paul, during the time i was waiting for the answer, i kind of figured out a way similar to the first one, now since you have also proposed a more elegant way, i will look into it also. Thanks, best, lailai On Wednesday, January 16, 2019 at 12:08:18 PM UTC-5, Jean-Paul

Re: [deal.II] Re: Problem with Block Preconditioner and Fully Periodic Boundary Conditions

Hi Wolfgang, thanks for the reply. I'm working on Immersed Boundary Method and flagella swimming, and, more specifically, I'm trying to model a unit square domain, which is infinitely replicated in two dimensions, governed by the incompressible time-dependent stokes equations for low Reynolds

Re: [deal.II] apply Pouseuille BC at multiple inlets with different velocity magnitudes

Dear Laila, I have two suggestions that may help you here: 1/ You could add the boundary ID as an argument to the PoiseuilleBoundaryValues class: template class PoiseuilleBoundaryValues : public Function { public: PoiseuilleBoundaryValues (const typename types::boundary_id b_id)

Re: [deal.II] How to implement GridGenerator::channel_with_cylinder?

Dear Nick, Indeed, it would be quite straightforward to extend the GridGenerator::plate_with_a_hole() function to one that has a filled inclusion using the steps that David has listed.

[deal.II] Re: How to implement GridGenerator::channel_with_cylinder?

Hi Nick, I think the following would work: 1. Create a triangulation via GridGenerator::plate_with_a_hole. 2. Create a second Triangulation via GridGenerator::hyper_ball. If you are working in 3D then you will have to extrude this. Use GridTools::transform to recenter this Triangulation in the

[deal.II] Re: Implement of adaptive mesh refinement cannot work in time-dependent problem.

Chucui, Thanks for your quick answer! In my deal.ii (version 8.5.1), the code also > fails in the 9th time step. Shall I need to reinstall my deal.ii into the > newest version? > Normally, we only fix bugs in the library in the developer version which is also very stable unless you are

[deal.II] Re: Implement of adaptive mesh refinement cannot work in time-dependent problem.

Dear Prof. Arndt, Thanks for your quick answer! In my deal.ii (version 8.5.1), the code also fails in the 9th time step. Shall I need to reinstall my deal.ii into the newest version? For the shortest test code, please give me some time. Because I have deleted about 2000 lines. If I delete

[deal.II] Re: Implement of adaptive mesh refinement cannot work in time-dependent problem.

Chucui, with a recent developer version your code fails for me in the 9th time step when the solver fails to converge within 1000 iterations. Hence, I can't reproduce the problem with a newer deal.II version. Please provide a minimal example by removing all functionality that is not necessary