Time Averaged Wall Shear Stress and Oscillating Shear Index Computation

Dear all,

I have a question that is about post-processing to extract time-averaged values.
For my simulations of flow in the human aorta I am currently calculating the instantaneous wall shear stress values at the surface of the geometry.
Now, additionally I would like to calculate the time averaged wall shear stress and the oscillating shear index.
OSI WSS

My WSS values for every timestep are saved to a timeseries .xdmf file that points to a h5 file.

I would like to average these WSS values over one cardiac cycle.
My initial attempt was to use Paraview to compute time-averaged values, however, perhaps there is a better way to do this.

Do you have any experience with this procedure or perhaps an example you could refer me to?

Thank you in advance for your time.

With kind regards,