Hi All, I am a new user of
 

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. http://www.cfd-online.com/OpenFOAM_D...your_image.gif

Thanks in advance,
Susan.

Hi All, I am a new user of Op
 

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. http://www.cfd-online.com/OpenFOAM_D...your_image.gif

Thanks in advance,
Susan.

Sorry, I tried to upload the i
 

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?

You can not do that for the mo
 

You can not do that for the moment. See no picture

Dragos

Did you include the momentum s
 

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.

/Ola