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Old   November 20, 2004, 20:25
Default convergence problem
  #1
sarah_ron
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Dear all,

I have a question about convergence criteria by using surface motior. If the residual is oscillatiing but lower than 1e-3 and surface monitor is also oscillating around a constant, is the solution converged?

Any reply is welcome.

regards, sarah
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Old   November 21, 2004, 11:54
Default Re: convergence problem
  #2
akbar
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Dear my friend

I have a suggestion for convergence criteria. in addition to residuals you can plot the variation of a parameter as velocity magnitude at a point in your flow domain as the fluent runs. if the magnitude of this parameter reaches to a constant value it means that the solution is converged. hope it will help you.

Best wishes A.safarzadeh
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Old   November 21, 2004, 12:52
Default Re: convergence problem
  #3
Anton
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What are you trying to simulate? It could mean that your problem is unsteady. You could change to the unsteady solver and monitor the surface variable with time to see if it exhibits an oscillatory pattern.
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Old   November 22, 2004, 23:48
Default Thanks a lot
  #4
sarah_ron
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Hi,dear

Thank you all for kind reply! I will try according to your advise.

sarah
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Old   November 24, 2004, 04:39
Default Re: Thanks a lot
  #5
nabeel mohsin
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hi, in monitors if residual is reducing with simulation then it is going to converge
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Old   November 26, 2004, 09:49
Default To nabeel Re: Thanks a lot
  #6
sarah_ron
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Thanks a lot!

could you give me more hints?

thanks

sarah
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