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[Fluent Meshing] Rotating a mesh generated with Fluent Meshing

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Old   October 4, 2021, 14:26
Question [Fluent Meshing] Rotating a mesh generated with Fluent Meshing
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So I have a mesh of a radial fan I have generated with Fluent Meshing (Normal Meshing module isn't able to generate an appropriate mesh) which consists of two volumes: a fixed one and a rotating one.



The problem is that when setting up the case and making the rotating mesh rotate, it works for a couple of iterations and after that it gives a negative volume error message. I have even tried the simplest case of a rotating sphere alone, following the same workflow and the problem is the same.



The radial speed is and needs to be 105 rad/s and I can't make it slower, and the timestep is aproximately 1e-4 s. The mesh is sufficiently fine with about 15M cells. And I am sure the parameters when setting up the mesh motion are fine.



The only thing I can think of is the need of Fluent Meshing to treat the interface as a shared face, which the normal Meshing module doesn't require, and thus not showing then the Mesh Interfaces option on the Fluent Solver.



Any help is appreciated, I am lost on how to solve this.
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Old   October 4, 2021, 14:50
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I have also tried splitting the faces afterwards in the Fluent solver but they remain as wall boundaries and can't be set as interfaces...
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fluent - parallel, fluent meshing mode, rotating body

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