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-   -   get no outflow / BC problem (http://www.cfd-online.com/Forums/openfoam-pre-processing/104109-get-no-outflow-bc-problem.html)

Bercht July 3, 2012 07:15

get no outflow / BC problem
 
Hi,

I have a geometry with different inlets and just one outlet. I want to fix the velocity at all inlets. Iam working with TwoPhaseEulerFoam. When i plot U glyphs with paraview there is no outflow at my outlet and i dont know why. I tried different BC but it is always the same... my actual BC for U and P are defined like that:
Ua/b
Code:

   
    OBJECT_Inlet1
    {
        type            fixedValue;
        value          uniform (0 0 0.1);
    }
    OBJECT_Outlet
    {
        type            inletOutlet;
        value          uniform (0 0 0);
        inletValue      uniform ( 0 0 0 );
    }
    OBJECT_wall
    {
        type            fixedValue;
        value          uniform (0 0 0);
    }
    OBJECT_inlet2
    {
        type            fixedValue;
        value          uniform (0 0 0);
    }
    OBJECT_inlet3
    {
        type            fixedValue;
        value          uniform (0 0 -0.5);
    }
    OBJECT_Wall2
    {
        type            fixedValue;
        value          uniform (0 0 0);
    }

P:
Code:

   
    OBJECT_Inlet1
    {
        type            zeroGradient;
    }
    OBJECT_Outlet
    {
        type            fixedValue;
        value          uniform 0;
    }
    OBJECT_wall
    {
        type            buoyantPressure;
        value          uniform 0;
    }
    OBJECT_inlet2
    {
      type            zeroGradient;
    }
    OBJECT_inlet3
    {
      type            zeroGradient;
    }
    OBJECT_Wall2
    {
        type            buoyantPressure;
        value          uniform 0;
    }

Hope you can tell me what is wrong with my BC.


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