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Procedure to plot Swirl Number in Fluent

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Old   April 21, 2014, 22:58
Default Procedure to plot Swirl Number in Fluent
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Abhi
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Hi,
Few days back I posted a thread on how to calculate swirl number in Fluent.
I contacted Ansys support and here is the way. I hope it will help others:

The swirl number is defined as the radius-weighted ratio of axial flux of angular momentum to the axial flux of axial momentum.

SWIRL_NUMBER = FLOWRATE(radius*tangential-velocity) / FLOWRATE(radius*axial-velocity)

You can use custom field functions to obtain radius*tangential-velocity and radius*axial-velocity.
Some users use a reference radius in the denominator such that:
Denominator = radius_ref*FLOWRATE(axial-velocity)
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Old   February 23, 2015, 05:20
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Kamal
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thanks a lot for the definition.

i am modelling a cyclone separator unit and is interested in obtaining the swirl number decay downstream.

I am however having a difficulty in obtaining the radius weighted and flow rate in custom field function.

Thanx a bunch
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Old   February 16, 2016, 10:07
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paul
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Hi all,

Quote:
Originally Posted by abhinav.abhi19 View Post
SWIRL_NUMBER = FLOWRATE(radius*tangential-velocity) / FLOWRATE(radius*axial-velocity)
Denominator = radius_ref*FLOWRATE(axial-velocity)
Tell me, please, how can I define function FLOWRATE() ?
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Old   February 16, 2016, 11:15
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paul
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Hi all,
Tell me please, how can I calculate radius on the surface?
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Old   July 5, 2016, 15:05
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RCris
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Thank you Abhi. It's been very useful!
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