# Getting streamfunction field by post processing the velocity field

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 June 9, 2012, 09:17 Getting streamfunction field by post processing the velocity field #1 Member   G. S. Join Date: Nov 2010 Posts: 53 Rep Power: 9 Hi CFD guys, I developed a collocated 2D CVFEM code for unstructured grids and I want to get the streamfunction field from the velocity field I get when I solve the momentum and continuity equations. How can I do this??? Thanks in advance...

June 9, 2012, 13:22
#2
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Filippo Maria Denaro
Join Date: Jul 2010
Posts: 3,752
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Quote:
 Originally Posted by gerardosrez Hi CFD guys, I developed a collocated 2D CVFEM code for unstructured grids and I want to get the streamfunction field from the velocity field I get when I solve the momentum and continuity equations. How can I do this??? Thanks in advance...
a choice: you can compute the vorticity field rot V then solving for Div Grad Psi = rot V

June 9, 2012, 13:44
#3
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G. S.
Join Date: Nov 2010
Posts: 53
Rep Power: 9
Quote:
 Originally Posted by FMDenaro a choice: you can compute the vorticity field rot V then solving for Div Grad Psi = rot V
Thanks FMDenaro but for solving this I need boundary conditions, so my next question is what are the boundary conditions for this system?

Thank you very much FMDenaro...

 June 9, 2012, 13:47 #4 Senior Member   Filippo Maria Denaro Join Date: Jul 2010 Posts: 3,752 Rep Power: 41 when you know the velocity on the boundary then you know also the Psi assignment....

 Tags collocated, cvfem, streamfunction

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