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Old   March 7, 2013, 06:18
Default Dynamic mesh
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I am not really a Fluent whiz, so, here is a question:
Is it ok to make a two-way FSI considering a gas compressor blade using Fluid Flow (Fluent) with Dynamic Mesh turned off or the Fsi doesn't make sence in this case?
I did not use dynamic mesh because otherwise I got messages about negative cell volume and I'm tired trying to make it positive)).
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Old   March 7, 2013, 08:15
Anton Lyaskin
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When you turn off dynamic mesh, you get one-way FSI instead of two-way. So it's better to find the reason of negative cell volume messages. Usually it means that your time step is too big. Or you've messed something in dynamic mesh methods...
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Old   March 7, 2013, 10:48
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try to change the layer dimension (from dynamic mesh menu) or the mesh cell dimension . Usually there is a problem in the dynamic mesh direction. Tray to create a mesh for layer (on a plane e extrude for alla lenght).

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Old   March 7, 2013, 23:01
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Thanks for the replies guys.
I think that the time step is small enough, and so I tried different Mesh Methods, but there is a new problem:
Couldn't intersect threads 7 and 8.
Can you tell what's this about?

By the way, I didn't really get anything about layer dimension or the mesh cell dimension, or a mesh for layer. I looked through the fluent tabs, but didn't find anything about, so could you tell me what you meant?
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2-way fsi, dynamic mesh, fluent, negative cell volume

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