### Streamlines

Posted:

**04 Apr 2020, 15:59**Hi everybody,

I wonder which equation is used to compute streamlines of a given vector field F, litterature indicates that a vorticity equation for the streamfunction is mainly used (a laplacian equation) as follow : The weak formulation is : It seems that equation globaly works but :

1 - the streamfunction don't have the same range value as StreamSolver module (i know that only differences are important). How is Elmer do the scaling ?

2 - That method give bad results with coarse meshes compare to Elmer module.

Any ideas on how to improve ?

I wonder which equation is used to compute streamlines of a given vector field F, litterature indicates that a vorticity equation for the streamfunction is mainly used (a laplacian equation) as follow : The weak formulation is : It seems that equation globaly works but :

1 - the streamfunction don't have the same range value as StreamSolver module (i know that only differences are important). How is Elmer do the scaling ?

2 - That method give bad results with coarse meshes compare to Elmer module.

Any ideas on how to improve ?