[Paraview] Gradient of 2D velocity field with paraview

[Eleonora Piersanti]

Hi to everyone!I computed with finite elements a 2D velocity field. I plotted without any problem the velocity field with paraview. I would like to compute the gradient. 
I tried Filters->Gradient of Unstructured Data Set but without succes.Can you help me?Thanks, 
Nora


 

   
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