Qrthogonal Quality of rotating sliding mesh keeps decreasing -- CFD Online Discussion Forums

September 18, 2014, 05:05

Qrthogonal Quality of rotating sliding mesh keeps decreasing

olux

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Join Date: Jul 2014

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In fluent 14.0,I find the Qrthogonal Quality in the rotating area decreases slowly when I use sliding mesh.And Negative volumes appear near the rotating surface after about 1900 time steps.

Attached is a picture of mesh near the cylinder surface (after 1300 time steps).

The rotating speed is 1250 rad/s , one time step is 2.5132e-5 s , the mesh is imported from Gridgen1518.

Why rotating mesh becomes worse and worse? Could anyone give me some help please?

Attached Images

mesh.jpg (97.0 KB, 11 views)

Tags

qrthogonal quality, rotating cylinder, sliding mesh

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