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Old   January 21, 2010, 22:21
Default Wall Shear Stress
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I am performing a multiphase simulation in a cyclone separator. The wall boundary conditions are set to no slip for air, and free slip for the dispersed phase. The free slip condition sets the normal velocity to the wall for the dispersed phase to zero. The wall shear stress is set to zero as well. However, in post processing, there are still wall shear values for the dispersed phase.

Can someone explain to me why this is occured?
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Old   January 22, 2010, 23:45
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Quote:
Originally Posted by mtl40 View Post
I am performing a multiphase simulation in a cyclone separator. The wall boundary conditions are set to no slip for air, and free slip for the dispersed phase. The free slip condition sets the normal velocity to the wall for the dispersed phase to zero. The wall shear stress is set to zero as well. However, in post processing, there are still wall shear values for the dispersed phase.

Can someone explain to me why this is occured?
If you aren't smart enough to tell us what code you used and what post-processor, then it is probably due to your own incompetence.
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Old   January 23, 2010, 01:19
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This is with ANSYS CFX.
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Old   January 23, 2010, 03:08
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This is with ANSYS CFX.
Why did you decide to post your question on the general forum, instead of on a completely random one like, for example, the ANSYS CFX forum?
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