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Old   April 11, 2005, 09:24
Default Fluent solver setup
  #1
saran
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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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Old   April 11, 2005, 09:31
Default Re: Fluent solver setup
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A.S.
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Check your wall y+, bring it to range of 30-60.
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Old   April 11, 2005, 23:22
Default Re: Fluent solver setup
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zxaar
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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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Old   April 12, 2005, 08:25
Default Re: Fluent solver setup
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saran
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Thanks A.S. & Xzaar, I will try your advise and see the results.
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Old   April 12, 2005, 08:31
Default Re: Fluent solver setup
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saran
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Hi AS

Could you pls guide me how do I adjust y+

Thanks a lot
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Old   April 12, 2005, 10:59
Default Re: Fluent solver setup
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A.S.
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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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Old   April 12, 2005, 11:20
Default Re: Fluent solver setup
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saran
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Thanks a lot AS.
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Old   May 2, 2005, 05:40
Default Re: Fluent solver setup
  #8
s.elayanila
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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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