finding flow angle
Help me in finding/claculating flow angle after analysis of centrifugal impeller.

use vector and stream line in the cfx post.

Hello,
in my case I have two vectors in a 3D domain, respectively Velocity in Stn Frame and Axial Velocity, of which I want to calculate the angle between themself. What is the best way to do this? There is a function to calculate the angle?? I think it is not possible to play with simple sin,cos... Help me. Thanks a lot. 
CEL has atn and atn2 functions. They can give you angles. Can do this is CFDPost or in the solver with a monitor point.

How can I use this function? Suppose I have to find the angle of attack over a cross flow turbine then what expression should be used

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