[a_habib]

Hello Everyone.
I don't know if this is the correct place to post 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:

    outlet
    {
        type            inletOutlet;
        value           $internalField;
        inletValue      $internalField;
    }

and for p:

    outlet
    {
	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.