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Problem with solving for incompressible flow

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Old   November 23, 2006, 07:12
Default Hi All, I am a new user of
  #1
susana
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Hi All,
I am a new user of OpenFOAM amd have a problem and will really appreciate any help.

I modified the simpleFoam (incompressible, steady-state) tutorial to include a momentum sink (function of velocity) and tried to solve for velocity U and pressure p . I am solving for a fixed velocity inlet and zero gradient outflow on slip walls. I am getting the right pressure drop but there is a fluctuation in the velocity values at the inlet and outlet in the answer and I dont understand why. I am attaching the output from paraview.

Thanks in advance,
Susan.
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Old   November 24, 2006, 04:01
Default Hi All, I am a new user of Op
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susana
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Hi All,
I am a new user of OpenFOAM amd have a problem and will really appreciate any help.

I modified the simpleFoam (incompressible, steady-state) tutorial to include a momentum sink (function of velocity) and tried to solve for velocity U and pressure p . I am solving for a fixed velocity inlet and zero gradient outflow on slip walls. I am getting the right pressure drop but there is a fluctuation in the velocity values at the inlet and outlet in the answer and I dont understand why. I am attaching the output from paraview.

Thanks in advance,
Susan.
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Old   November 24, 2006, 04:07
Default Sorry, I tried to upload the i
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susana
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Sorry, I tried to upload the image file twice but it does not even prompt me on netscape (7.0) . Am I doing something wrong?
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Old   November 24, 2006, 04:32
Default You can not do that for the mo
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Dragos
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You can not do that for the moment. See no picture

Dragos
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Old   November 24, 2006, 21:17
Default Did you include the momentum s
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Ola Widlund
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Did you include the momentum sink/source also in the equation for pressure correction? I think you should... If you derive the equation for pressure, you'll see your source/sink there, too.

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