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counter flow

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Old   May 17, 2019, 20:40
Default counter flow
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Hello
I am trying to develop counter flow model (schematic diagram attached). I am expecting a stagnation plane to be formed in the middle and flow should be going outward with two little vertices formed around the edges the, instead I am finding a reverse flow situation in OpenFOAM.
I have run the same simulation in Fluent and it is giving me conceivable streamline pattern.

I am using icoFoam solver. Following boundary condition I am providing for outlet:

for 0/U

internalField uniform (0 0 0);

outlet
{
type pressureInletOutletVelocity;
value $internalField;
}

for 0/p
internalField uniform 101325;
outlet
{
type totalPressure;
p0 $internalField;
}

Results from Fluent aligns with theoretical understanding of fluid mechanics. Why OpenFOAM is causing reverseflow? I understand that near the edge there is a pocket if negative pressure, but that should not cause a steady state solution with forming a jet (contributed by reverse flow coming from outlet!)
Attached Images
File Type: jpg counterflow_schematic diagram.jpg (22.0 KB, 3 views)
File Type: jpg openFoam output.jpeg.jpg (104.7 KB, 3 views)
File Type: jpg ansys output.jpeg.jpg (78.0 KB, 4 views)
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