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Paraview - Calculation of Swirl Angle

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Old   July 8, 2019, 11:33
Default Paraview - Calculation of Swirl Angle
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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.
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Old   July 13, 2019, 05:41
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Any expert here can advise?

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