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interFoam case mesh with baffles crushed

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Old   December 16, 2020, 15:08
Default interFoam case mesh with baffles crushed
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ves
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Veskov Eugene
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Dear collegues
I solved the problem draining tank with baffles ( baffles installed for prevent liquid rotation ) with interFoam (OpenFOAM 2006). Boundary conditions: Totalpressure at the upper boundary, volume flow rateat the lower boundary, the rest of the boundary is the wall.
The calculation on a mesh without baffles was successful for grids built in ANSYS Fluent Meshing and snappyHexMesh, but for geometry with baffles, a divergent solution is obtained, the velocity increases to 100 m / s, the pressure varies from -5 ^ -10 to 500,000 Pa and he calculation time of one timestep increases dramatically in time for meshes built in ANSYS Fluent Meshing and snappyHexMesh with double-sided baffle surfaces.
Fluent mesh with baffles converted as in Thin Walls Conversion from Fluent Mesh
fluent3DMeshToFoam with baffles as “internal” + createBaffles give bad result too.
snappyHexMesh generate mesh with settings: snappyHexMesh + snappyHexMeshDict->geometry->baffles + createBafflesDict, create double-sided wall (baffle_master and baffle_slave)
Simulation with mesh converted by fluent3DMeshToFoam and baffles as “wall” give mesh with one-sided wall and works good some seconds of physical time, then failed abruptly.
What wrong in this settings? Need I additional work with meshes or it OpenFOAM bug?
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baffles, fluent, interfoam, mesh, snappyhexmesh

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