Did you try with Gradient of the velocity?

Yes, I'm on this stage now. But I don't know what to do next.

You can use calculator to multiply and obtain results,

Multiply... "what  on what" ? Gradient on Normals ?

Yes, it would be very nice if you will describe every stage of WSS calculation in Paraview.

Did you solve it in paraview?

Unfortunately, no

Dear Sergey Sindeev,

What simulation software are you using? Some of them have special tools to directly compute the WSS, such as OpenFOAM and Fluent, if I remember correctly. Did you try that?

Regards,

Iago

Dear Mr Oliveira, we have only MRI-measured data for the velocity field. This is not a result of CFD study...

Ali Bakhshinejad

use the normal gradient to compute the wall shear stress parallel the local wall surface, then integrate it over the wall.