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Old   April 8, 2009, 17:28
Default Combining bodies in CFX
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Hi All,

The short version of my question: I have a problem with CFX-Pre being very very slow in a geometry with lots of sub-bodies within each mesh. I'm looking for advice on how to recombine sub-bodies into one larger mesh body.

The longer version:
The mesh matches perfectly at the boundaries of the sub-bodies as they were created by a single ANSYS meshing application mesh operation. Decomposition of the geometry into sub-bodies was necessary to get a good mesh using the ANSYS sweep mesher. However, I now need to make 40 copies of this mesh in CFX-Pre to model my domain, and I end up with >1500 mesh sub-bodies in CFX-Pre a result and CFX-Pre becomes very very very slow.

Any advice on how to recombine mesh sub-bodies, or to speed up CFX when may sub-bodies are present would be very welcome.

Many thanks for your advice,
andy2o
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Old   April 9, 2009, 07:30
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Not exactly an answer to your questions, but instead of so many copies of your mesh, could you make use of symmetry or periodicity boundary conditions?
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Old   April 9, 2009, 07:42
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Quote:
Originally Posted by LKF View Post
Not exactly an answer to your questions, but instead of so many copies of your mesh, could you make use of symmetry or periodicity boundary conditions?
Hi LKF,

Thanks for your reply. It's a sensible suggestion - and indeed I had hoped to use periodicity to model just one section of the geometry. However, a combination of variable source terms and test results are showing that this just cannot easily be justified.

Best regards,
andy2o
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