[foamF]

Swirl angle is a useful parameter to describe the inlet performance of a pump suction. It is defined as the ratio of tangential velocity to axial velocity.

Any expert here can explain how to calculate the swirl angle for a given plane in Paraview (possibly based on the calculator filter)? Is it necessary to do the calculation based on the vorticity results, or just the velocity results are used?

Thanks a lot.

[foamF]

Any expert here can advise?

Is it appropriate to use the surface integral of vorticity (curl) to find the average tangential velocity?

[mwmalkawi]

Did you manage to find an answer to this please