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Old   June 23, 2008, 10:52
Default Updating dynamic mesh
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I have a deforming boundary wall whose motion is set by a UDF and find that for transient simulations the motion of this boundary wall is only updated after each timestep. Is there a way to let Fluent update the dynamic mesh motion (in my case a deforming boundary and mesh smoothing) after each (few) iterations?

I tried the execute command 'solve/mesh-motion' which works fine but automatically proceeds to the next timestep. Maybe I can go back a timestep next or is there maybe another way to do the trick?

Kind regards
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Old   June 23, 2008, 14:42
Default Re: Updating dynamic mesh
red lemon
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reduce the time step size. Iterations are to solve the flow field for that timestep so reduce time step and associated number of iterations per time step.
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Old   June 24, 2008, 02:37
Default Re: Updating dynamic mesh
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As my wall motion depends on the fluid solution I would very much like to solve them simultaneously. As I have to underrelax the wall motion very much to get stability, a smaller timestep would yield an unphysical lag between the fluid pressure and the wall motion which can be circumvented by solving both simultaneously.

Any tips, tricks, ideas?
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Old   July 11, 2008, 19:52
Default Re: Updating dynamic mesh
adel m
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i want to knwo every thing about dynamic mesh
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