|May 9, 2011, 22:39||
Results are time step dependent
Join Date: May 2011
Posts: 22Rep Power: 6
I am trying to simulate a moving mesh problem where the motion is governed by fluid flow. i.e force_y()@Region:CYLINDER
I created the mesh in ICEM and did a grid and time convergence study for a stationary cylinder at Re=100. The residuals have an rms of 1e-05. The results obtained were accurate for a stationary cylinder but when I used the same grid for mesh motion, the results (displacements) were time step dependent. getting close to correct results for tstep=0.01 but very low values for tstep=0.001
1.) In my case should the grid convergence be done for moving mesh or stationary mesh ???
Thank you very much.
|May 10, 2011, 19:00||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 11,587Rep Power: 90
It may well be that your moving mesh model requires a different time step size. Looks like you need to repeat the convergence study with the moving mesh model.
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