Fwd: Leaking refined mesh

[Malik]

Dear all,

First of all I am using dealii version 9.5.0.

I created a mesh and got into some problems which I hope to describe with the following minimal example.The code is in "mesh_code.txt".

In there I merge the unrefined triangulations of a hyper_shell and a hyper_ball_balanced where the vertices fitted together. Then I use a PolarManifold for the outer hyper_shell and a TransfiniteInterpolationManifold on the inner hyper_ball except for the boundary which is set as a PolarManifold. With this I get the mesh depicted in figure "mesh_unrefined.png".

Then I refine only the outer hyper_shell which results in the second figure "mesh_refined.png". Here comes the problem. As one can see the mesh is leaking in between. First I thought of a problem resulting from paraview but I looked into the distance of the vertex and the center of the face which should coincide but have a rather large distance from another.

Did I do something wrong and does someone know a solution to this problem?

Best regards,

Malik Scheifinger

[Wolfgang Bangerth]

On 8/27/24 08:19, Malik wrote:
>
> Then I refine only the outer hyper_shell which results in the second figure
> "mesh_refined.png". Here comes the problem. As one can see the mesh is leaking
> in between. First I thought of a problem resulting from paraview but I looked
> into the distance of the vertex and the center of the face which should
> coincide but have a rather large distance from another.

Does this answer help?
https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#in-my-graphical-output-the-solution-appears-discontinuous-at-hanging-nodes

Best
W.

--
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Wolfgang Bangerth email: bang...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/