Post Processing Question
 

I have a geometry which in the form of a cube. There is a certain pressure distribution on face 1 of the cube and a different pressure distribution on the face 2 (which is exactly opposite to face 1).

I want to display the " DP (pressure drop )" contours between these two faces. ( i.e P (@ face 1) - P (@face 2) , and do this for all nodes on the two faces ).

Is there a way to do this ??

Thanks in advance for any inputs.