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Old   July 30, 2007, 11:52
Default Bounds error detected
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I'm doing automatic backups of a simulation and after the writing of each backup, the solver gives the following message:

>Bounds error detected


>Variable: Turbulence Eddy Frequency

>Locale : Inlet

Does anyone know what this means ? In the inlet plane I specified experimental profiles of velocity and turbulence.

Thanks, Felix
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Old   July 30, 2007, 12:11
Default Re: Bounds error detected
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Dear Felix,

Turbulence Eddy Frequency, aka Omega is negative somewhere in the inlet.. Please check the interpolated numbers from the specified experimental values produce positive values.

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Old   July 30, 2007, 13:35
Default Re: Bounds error detected
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Hi Opaque,

Thanks for your help. I checked Omega at the inlet and the value is not negative but rather tends to infinity (1e30)in the near-wall region.

It is not surprising since the turbulent kinetic energy profile (k) is stricly 0 at the wall leading to a division by zero (omega~epsilon/k).

Do you think that this can cause any other problem ? I have trouble with convergence but in another region...


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