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Errorneous velocity near walls while using wedge type BC for axisymmetric flow

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Old   February 9, 2013, 01:41
Default Errorneous velocity near walls while using wedge type BC for axisymmetric flow
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Anant Diwakar
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Hi

I am solving axisymmetric flow problem of flow between two rotating cylinders using rhoCentralFoam using wedge type BC. I generated the mesh in GMSH and converted it into openFoam using gmshToFoam utility.
But when I am running the simulation, I am getting non-zero radial velocity near the outer rotating cylinder, which ideally should be zero.

The Uy and the velocity vector plots near the outer rotating wall
are attached.

The rotation is about X axis. Hence Uy is the radial velocity component.

Can some one tell why is this happening ?

Thanks
Anant
Attached Images
File Type: jpg Uy_near_wall.jpg (18.2 KB, 13 views)
File Type: jpg velocity_vectors.jpg (63.9 KB, 10 views)
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