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-   -   [ANSYS Meshing] Meshing takes forever (https://www.cfd-online.com/Forums/ansys-meshing/161834-meshing-takes-forever.html)

yahmed October 29, 2015 17:33
Meshing takes forever
 
Hello Ansys Experts,

I am trying to mesh my model using tetrahedrals method in patch independent mode. I left it for more than 12 hours and it was not generated on a machine with 64 cores and 512 GB RAM!!!!!!! The model is large but I don't think this is a reasonable time !!!

I did meshing for the model before using Cutcell method in about 3 hours (on a 12 cores and 32 GB RAM PC) and generated 10 million cells, but I want to change the meshing method because I have read that cutcell mesh doesn't go well with multiphase model (VOF)...

Any ideas here? What is the typical time required for meshing? What is the best method of meshing for VOF model??

Thanks,
Yousra

Antanas October 29, 2015 22:40
Quote:
Originally Posted by yahmed (Post 570914)
Hello Ansys Experts,

I am trying to mesh my model using tetrahedrals method in patch independent mode. I left it for more than 12 hours and it was not generated on a machine with 64 cores and 512 GB RAM!!!!!!! The model is large but I don't think this is a reasonable time !!!

I did meshing for the model before using Cutcell method in about 3 hours (on a 12 cores and 32 GB RAM PC) and generated 10 million cells, but I want to change the meshing method because I have read that cutcell mesh doesn't go well with multiphase model (VOF)...

Any ideas here? What is the typical time required for meshing? What is the best method of meshing for VOF model??

Thanks,
Yousra
Maybe element size is too low? Try to generate coarse mesh first and then decrease element size gradually.

yahmed October 29, 2015 23:13
Quote:
Originally Posted by Antanas (Post 570939)
Maybe element size is too low? Try to generate coarse mesh first and then decrease element size gradually.
Thank Antanas for your reply. No actually I am trying a coarse size!!

Antanas October 30, 2015 00:22
Quote:
Originally Posted by yahmed (Post 570941)
Thank Antanas for your reply. No actually I am trying a coarse size!!
Very strange. Patch independent tetrahedrons must be fast and robust... Maybe there's another reason. Can you share your project?

yahmed October 30, 2015 00:44
Quote:
Originally Posted by Antanas (Post 570947)
Very strange. Patch independent tetrahedrons must be fast and robust... Maybe there's another reason. Can you share your project?
Yes sure no problem, can you give me your email address please?

Antanas October 30, 2015 08:44
Quote:
Originally Posted by yahmed (Post 570948)
Yes sure no problem, can you give me your email address please?
No :D
Post link here


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