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Negative cell volume issue in Fluent

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Old   October 7, 2021, 04:58
Default Negative cell volume issue in Fluent
Join Date: May 2015
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sidharath is on a distinguished road
Hello all,
I am trying to model a propellor in Fluent and facing a negative cell volume issue when trying to preview mesh motion (transient simulation).
- I have tried very low timesteps (~e-8 s) to no avail
- Mesh (tet with prisms) was created ICEM and there aren't any negative cell volumes. I did a mesh check before importing it to fluent.
- The steady model (frame motion - I guess MRF?) works fine but the unsteady sliding mesh doesn't

I am using fluent for the first time and could be setting up interfaces wrongly. I have attached a picture of the interface set-up for you guys to see.

I am not sure what is going wrong. I did a finer mesh and a coarser mesh but the problem still persists. Any troubleshooting idea would be really helpful.
Furthermore, the wider objective of this study is to model flow-induced noise. Any tips on how to go about it in fluent would be great too.

Thank you
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File Type: jpg interfaces.jpg (107.6 KB, 3 views)
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fluent, negative cell volume, sliding mesh

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