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Odd behavior on the outlet

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Old   December 29, 2015, 07:39
Question Odd behavior on the outlet
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Ahmad Habib
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Hello Everyone.
I don't know if this is the correct place for my thread.
I'm trying to simulate the flow in an air supply system (using incompressible S-A DDES) as you can see in the attached photo and I'm interested only in the flow in the duct's end region, but I'm noticing an odd behavior, the semi-spherical surface should be an outlet but the flow is not completely exiting throw the outlet, and I think that could effect the solution quality.
My BC at the outlet:
For U:
        type            inletOutlet;
        value           $internalField;
        inletValue      $internalField;
and for p:
	type            outletInlet;
	outletValue	uniform 0;
	value		uniform 0;
Any one can explane the reason of this behavior
If this is wrong ... what I should use?
Or I should use different outlet shape for my simulation?
Thanks in advance.
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Old   January 7, 2016, 15:04
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Matvey Kraposhin
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set totalPressure for pressure field, zeroGradient for U
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outlet, outlet boundary condition

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