# How to calculate swirl velocity

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 June 13, 2009, 10:30 How to calculate swirl velocity #1 Member   Hamoudi djamel Join Date: Apr 2009 Posts: 50 Rep Power: 9 Hello Everybody, please, could any one tell me how to calculate Swirl Velocity I have and radial and tangential velocities Thanck you very much

February 4, 2015, 06:44
#2
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sabrina bina
Join Date: Jan 2015
Location: Algeria
Posts: 10
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Quote:
 Originally Posted by hamoudi Hello Everybody, please, could any one tell me how to calculate Swirl Velocity I have and radial and tangential velocities Thanck you very much
please, if you have found a method, please tell me, I have the same problem, slip velocity and temperature jump

March 2, 2015, 14:25
#3
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Matt
Join Date: Aug 2014
Posts: 556
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Quote:
 Originally Posted by sabrina please, if you have found a method, please tell me, I have the same problem, slip velocity and temperature jump

Unless I am mistaken, swirl velocity is just another term for tangential velocity. The only trick in extracting it from star-ccm+ is making sure that the axis definition for your region is correct. Otherwise your velocities might not make any sense.

That being said, if you mean to ask how to calculate the angular velocity (i.e. rpm, rad/s, etc) all you have to do is define a field function. Specifically:

Then you can either get the volume or mass average of the fluid in your duct OR setup a mass flow average report that gives it at a plane.

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