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-   -   Getting streamfunction field by post processing the velocity field (https://www.cfd-online.com/Forums/main/103053-getting-streamfunction-field-post-processing-velocity-field.html)

 gerardosrez June 9, 2012 09:17

Getting streamfunction field by post processing the velocity field

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???

 FMDenaro June 9, 2012 13:22

Quote:
 Originally Posted by gerardosrez (Post 365595) 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

 gerardosrez June 9, 2012 13:44

Quote:
 Originally Posted by FMDenaro (Post 365612) 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...

 FMDenaro June 9, 2012 13:47

when you know the velocity on the boundary then you know also the Psi assignment....

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