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#1 |
Guest
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Hi
In a fluid flow problem using k-e turb. model I get good convergence however my drag & force results are very large as compared to experiment. I have checked the grid scaling and corrected but still have large difference. Is there any other parameter(s) feed which I have missed? I will be obliged if any one can guide me through this. Thanks in advance |
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#2 |
Guest
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Check your wall y+, bring it to range of 30-60.
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#3 |
Guest
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check the reference values u have set, are they set properly, if they are not set to correct values, you might see arbit results.
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#4 |
Guest
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Thanks A.S. & Xzaar, I will try your advise and see the results.
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#5 |
Guest
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Hi AS
Could you pls guide me how do I adjust y+ Thanks a lot |
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#6 |
Guest
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Though y+ adaptation is not prefered, try it. Be careful y+ is based on Cell Centre Distance from wall, not distance of first grid point on the wall. Goto "Resource" section then "Calc" then "Misc". There is a viscous spacing calculator. Give good aprox. values for air foil. Make you near wallmesh based on it (double the value you get)
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#7 |
Guest
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Thanks a lot AS.
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#8 |
Guest
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Sirs,
Actually I did't get solution converged.I'm not sure about the meshing.Is anything impotant for mesh consideration? Thank you very much. |
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