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Fluent computation using Pointwise T-Rex mesh

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Old   September 16, 2014, 08:56
Question Fluent computation using Pointwise T-Rex mesh
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ZH Wu
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Hi all.

I am using pointwise to generate the mesh of turbomachinery blade passage. T-Rex in the Block is adopted close to the endwall and blade for boundary layer meshing. The attached is an example of mesh surface cutting.

The problem I met is that, the Fluent computation on this mesh is unconverged due to the mesh quality. When I try on a mesh without the T-Rex boundary layer, it runs well although the prediction accuracy is not satisfied.

My questions are, is it wrong that I export the case file directly from Pointwise? Or what should I do before I export the case file for Fluent?
T-Rex has the ability to combine the boundary layer T-Rex tets into prisms. How can I achieve this when I export the case file?
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Old   September 16, 2014, 11:31
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Chris Sideroff
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Quote:
Originally Posted by Optimizer View Post
My questions are, is it wrong that I export the case file directly from Pointwise? Or what should I do before I export the case file for Fluent?
T-Rex has the ability to combine the boundary layer T-Rex tets into prisms. How can I achieve this when I export the case file?
Assuming you have the CAE type set to ANSYS Fluent (or any other unstructured CAE that supports mixed element meshes), when you export your mesh and enter the name of file, there's an option called "Combine Anistropic Tetrehedra". Check the box and it will create the prisms in the export Fluent .cas file.
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Old   September 16, 2014, 11:58
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Originally Posted by cnsidero View Post
Assuming you have the CAE type set to ANSYS Fluent (or any other unstructured CAE that supports mixed element meshes), when you export your mesh and enter the name of file, there's an option called "Combine Anistropic Tetrehedra". Check the box and it will create the prisms in the export Fluent .cas file.
Hi Chris. Thank you for your reply.

I have noticed your suggestion given in the other threads, indeed.

However, I can't find the panel showing "Combine Anistropic Tertehedra" when I export CAE. The solver I choose is ANSYS Fluent. Is there anything wrong I did?

BTW, when I export CAE in CGNS, "Combine Anistropic Tetrehedra" appears.

The version of Pointwise I am using is 17.0R2.
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Old   September 16, 2014, 12:38
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The version of Pointwise I am using is 17.0R2.
That would be why. The combination capability wasn't added to other CAE types until 17.1 (I think). Anyway, upgrade to the latest release and the feature will be there.
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Old   September 16, 2014, 13:17
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Originally Posted by cnsidero View Post
That would be why. The combination capability wasn't added to other CAE types until 17.1 (I think). Anyway, upgrade to the latest release and the feature will be there.
Thank you for your information.

I update the software.
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