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zcesd47 July 12, 2011 10:38

Help~!! undefined cells
 
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Dear all friends

I defined a smooth free surface using mesh that matches the initial wave profile,and then remeshed to hex mesh it after a few step. But when I check the volume fraction of XZ plane face, there are many undefined cells and the remeshed mesh was broken. But when I check the mid face, the cell is smooth.. Why this happen!? Is it because geometry problem??



Thanks a lot

Dijun

ghorrocks July 12, 2011 18:55

Why are you remeshing? This model should work fine without remeshing.

zcesd47 July 13, 2011 09:33

1 Attachment(s)
Quote:

Originally Posted by ghorrocks (Post 315893)
Why are you remeshing? This model should work fine without remeshing.

Thank you. In order to create a smooth wave profile I use the mesh to match the profile which does not has uniform cell, I thought better results can be obtained by remeshed to the structured mesh, but it seems does not work.

ghorrocks July 13, 2011 19:36

I would think you remeshing is going to do more harm than good. You should be able to use a very high quality hex grid on this simulation and free surface models work very well on high quality meshes. Your remeshing is significantly reducing the mesh quality. A step backwards in my view.

zcesd47 July 14, 2011 09:08

Quote:

Originally Posted by ghorrocks (Post 316048)
I would think you remeshing is going to do more harm than good. You should be able to use a very high quality hex grid on this simulation and free surface models work very well on high quality meshes. Your remeshing is significantly reducing the mesh quality. A step backwards in my view.

Thank you so much for the advices!!:) I will do several more trial and if it does not work I ll not use remesh.


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