Plot3D file - Iso-surfaces and intersection plot
 

I currently have a plot3D results file output.

I have a vector VelVect which contains point data for VelX,VelY,VelZ and can
obviously be used to represent the Velocity magnitude.

Now for the gradient I used 'ComputeDerivatives' filter and then
this provided the Vorticity as a vector output type.

Q) I would like to create iso-surfaces of vorticity. So far using the 'Contour' filter doesn't help since it only doesn't have the vorticity (cell-based result) available on the drop-down but only the original results output array. Is it possible to get vorticity iso-surfaces?

Q) Next, I'd like to extract surface pressure profiles from the circumference of the cylinder. I've tried to use the 'Plot over Intersection' filter but that didn't work and resulted in all the individual blocks in the mesh appearing in the results tree. There were 100s for each of the variables.

What is the best way to do this from the 9 variables that are in my multi-block results file?

Would really appreciate your responses.

Here are some of the FILES