[coroi]

Hi everyone,

I was trying to understand how this pressureInletOutletVelocity BC works but i failed. According to the Userguide (OF 2.1):
pressureInletOutletVelocity is a combination of pressureInletVelocity and inletOutlet ;
inletOutlet Switches U and p between fixedValue and zeroGradient depending on direction of U ;
pressureInletVelocity When p is known at inlet, U is evaluated from the flux, normal to the patch ;

I guess when it's inletOutlet it uses U of adjacent cells to the pach to see if the flow exits or enters the domain in order to set fixedValue or zeroGradient for U . But why does the inlet has something to do with another patches and why P is needed to compute U ?

Thanks much for your help!
Regards

[wouter]

hello coroi,
pressureInletOutletVelocity has nothing to do with patch inlet it just tells you that the inletVelocity of this patch is based on the pressure at the patch if the pressure is unknown than depending on the direction of U it is zerogradient or fixed value as you described. So not when P is known at the patch "inlet" but at this patch where this type is used.

Hope this helps
Wouter