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Incompatibility between 2 boundary conditions in Pitzdaily case

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Old   October 5, 2009, 11:23
Lightbulb Incompatibility between 2 boundary conditions in Pitzdaily case
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Hi all,
I've just noticed something weird in the 0-directory for the velocity U:
We have:

inlet
{
type turbulentInlet;
referenceField uniform (10 0 0);
fluctuationScale (0.02 0.01 0.01);
value uniform (10 0 0);
}

outlet
{
type inletOulet;
inletValue (0 0 0); // I thought it was (10 0 0) no ?
value (0 0 0);
}

Indeed, I can't understand this latter, although the inlet velocity is defined by (10 0 0), we use a different one for the outlet BC.
Does anybody know the reason ?
Moreover I don't know why we have to specify the keyword ''value'' ? besides, in some cases it doesn't appear.
Thank you in advance!
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Old   October 5, 2009, 12:43
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Jose Luis Santos
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Hi,

The inletValue in the inletOutlet boundary condition specifies the inflow velocity at your outlet - normally you want it to be zero to prevent inflow.

Regards,
Jose Santos
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Old   October 6, 2009, 06:39
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Thank you for answering so quickly,
nevertheless, I've seen the documentation for "turbulentInlet" and it doesn't specify anything about the keyword "value", so what is the purpose of it ?
Same question concerning "inletOutlet", because there is no change when we delete it.
regards,
Rom.
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Old   October 9, 2009, 22:50
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By looking at the U file at other time, I think, value specifies the velocity at ascribed path. so, at time 0, the inelt velocity is uniformly 10, but it varies for other time.
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Old   October 20, 2009, 07:16
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yes, I think so as well.
thank you.
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