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

Does anybody have an example of how to fill out the hole and assign to it different material ID? Thank you, Nick. On Wednesday, December 19, 2018 at 12:07:16 PM UTC-5, Daniel Arndt wrote: > > Chucui, > > the mesh you are showing degenerates close to the midpoint. This isvery > likely not what

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

On 1/15/19 10:02 AM, ntets...@berkeley.edu wrote: > thank you for replying. I have looked thoroughly step 45 but it's not of much > help for my case. I actually want to impose periodic boundary conditions for > both velocities and pressure (I need to have a representative periodic cell). Is

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

Hi Daniel, thank you for replying. I have looked thoroughly step 45 but it's not of much help for my case. I actually want to impose periodic boundary conditions for both velocities and pressure (I need to have a representative periodic cell). I used the following lines to set pressure to

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

Magda, [...] > DoFTools::make_periodicity_constraints(dof_handler, 2, 3, 1, constraints); > DoFTools::make_periodicity_constraints(dof_handler, 4, 1, 0, constraints); > > These two lines imply that you want to impose periodic boundary conditions for all the components. Assuming the

Re: [deal.II] Several questions about mesh generation and distributed triangulations

Dear Wolfgang, thank you for your reply! I only noticed it now a while later since I had thought the topic was dead back when I posted it. Thank you for your time and effort! Remarks to your response below: Am Dienstag, 30. Oktober 2018 17:26:21 UTC+1 schrieb Wolfgang Bangerth: > > > Pascal,

Re: [deal.II] Non-linear reaction diffusion PDE

On 1/14/19 5:56 PM, D. Sarkar wrote: > > Thanks for the suggestions. Apologies for including the governing equation. > The equation is shown below with a non-linear reaction term: > > > > I had looked at the example you suggested but will have to go over your video > lectures. > Using some

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

Hi, any chance I could get your help with that? I'm trying to use the code of @Jie-Cheng for Block Preconditioner (https://github.com/dealii/code-gallery/tree/893bdb5b0a770758fce98859ab4d137f95e62a50/time_dependent_navier_stokes) for a case of fully periodic

[deal.II] Multigrid starting from other level than finest does not work with adaptive refinement

Dear all, I am able to reproduce the problem with modified step-37, I expect the similar problem in case of multigrid with sparse matrices. The problem occurs only if mesh is refined adaptively. I added refine_mesh() function and modified solve(): // //work on level 3, that is not the