Maybe. I don’t know anything about computing wall shear stress myself. There are several references for trying to do this:
- How to get Wall Shear Stress on a model
- https://www.paraview.org/pipermail/paraview/2016-October/038305.html
- [General] Calculate wall shear stress with paraview -- CFD Online Discussion Forums
That said, it might be better to have Nek5000 compute the wall shear stress if you can. Several people reported problems with computing it post processing including inaccurate velocities on the surface due to boundary conditions.