Hi all,
I struggled with this for 2 weeks tried to calculate WSS using Paraview. In the end it was not working due to the limitations in Paraview and it was not possible to calculate the slope near the wall with a predefined filter.
So, I decided to make a script in Python. Luckily the new PyVista library have some nice functionalities for 3D objects, mesh, and surfaces. You can find an example code on my github page.
Feel free to contribute and leave any comments.
https://github.com/EdwardFerdian/wss_mri_calculator