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[OpenFOAM] The Inlet boundary conditions are not correctly shown in paraView

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Old   July 23, 2018, 06:20
Default The Inlet boundary conditions are not correctly shown in paraView
  #1
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Upuli
Join Date: Feb 2016
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Dear members




I have a chamber which has shape shown in attached figure. Boundaries are inlet(bottom), outlet(at top), walls(left and right sides) and back and front.The blockMesh file entries are as follows


Code:
convertToMeters 1.0;

vertices
(
(-0.15 -0.3 -0.15) 
(-0.15 0.0 -0.15)
(-0.05 0.3 -0.15)
(-0.05 0.3 0.15)
(-0.15 0.0 0.15)
(-0.15 -0.3 0.15)
(0.15 -0.3 -0.15)
(0.15 0.0 -0.15)
(0.05 0.3 -0.15)
(0.05 0.3 0.15)
(0.15 0.0 0.15)
(0.15 -0.3 0.15)


);
blocks
(
hex (0 1 4 5 6 7 10 11) (30 30 1) simpleGrading (1 1 1)
hex (1 2 3 4 7 8 9 10) (30 30 1) edgeGrading (1 1 1 )
);

patches
(
wall Walls
(
(6 11 10 7)
(7 10 9 8)
(0 1 4 5 )
(1 2 3 4 )

)
patch Inlet
(
(0 5 11 6)
)
patch Outlet
(
(2 8 9 3)
)
empty back
(
(0 6 7 1)
(1 7 8 2)
)
empty front
(
(5 4 10 11)
(3 9 10 4)

)
);

edges
(
);

mergePatchPairs
(
);
I want to set the inlet velocity(U) to 0.12 ms-1. So my U file entries in the 0 folder are as follows.


Code:
dimensions      [0 1 -1 0 0 0 0];

internalField   uniform (0 0 0);

boundaryField
{
    Walls
    {
        type            fixedValue;
        value           uniform (0 0 0);
    }
    Inlet
    {
        type            fixedValue;
        value           uniform (0 0.12 0);
    }
    Outlet
    {
      type            inletOutlet;
     inletValue      uniform (0 0 0);
   value           uniform (0 0 0);
    }
    back
    {
        type            empty;
    }
    front
    {
        type            empty;
    }
}
But when I open the case in the paraview and in the internal mesh view, I see that U at inlet is shown as 0.005399 ms-1. The simulation runs without stop. In each time step folder the U value is correclty shown as 0.12 ms-1. How can I overcome this issue?


Thank You
Screenshot from 2018-07-19 12-16-10 -2.png
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Old   July 23, 2018, 08:05
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Joachim Herb
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Paraview shows you the values in the cell centers by default. By default, it only loads the internal mesh. If you want to see the values on the faces, you have to select them individually in the box "Mesh Regions" to be loaded.
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Old   July 24, 2018, 00:01
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Upuli
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Hi


Thank you very much for the explanation. Is there a method to set the cell center values at the inlet cells to the desired value(0.12 ms-1).


Thank you
regards


Upuli
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