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Postprocessing issue with dynamic mesh?

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Old   October 29, 2012, 13:38
Default Postprocessing issue with dynamic mesh?
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Daniele
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Hi all!
I was trying to simulate a dynamic mesh problem:
a parallelepiped which moves inside another parallelepiped, in z direction with an armonic motion (I used the DEFINE_CG_MOTION macro).
My domain is splitted into 3 parts: top, center (which includes the small parallelepiped) and bottom; these parts are connect with non conformal interfaces
I set layering in dynamic mesh options, specified the top and bottom as stationary and center as rigid body.

When plotting z velocity contour, for example, both in fluent built in postprocessing and CFD-POST, I obtain strange values (also vectors) at wall in the central region;
if I plot contour in tecplot it seems all is ok...

See attached pictures..

What do you think?

Thank you all

Daniele
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Old   November 2, 2012, 11:06
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Found on a presentation:

If you turn a fluid zone into a dynamic zone, you should also turn the associated moving walls into dynamic zones otherwise the incorrect wall boundary conditions will be applied, and you will get unphysical velocities adjacent to the wall.
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