Could CFX-post output turbulence intensity?

Anna Tian · January 22, 2013, 13:22

Hi,

May I ask could CFX-post output turbulence intensity directly?(I didn't find that output variable option.) Or I have to compute it manually by myself?

Thank you.

siw · January 23, 2013, 02:18

I have not found it there myself so I made an expression using the turbulent kinetic energy and the mean velocity, see the wiki page for the equations:

http://www.cfd-online.com/Wiki/Turbulence_intensity

evcelica · January 24, 2013, 16:20

I believe that "mean velocity" should be the local mean velocity, or just the local velocity for steady state, not the global mean velocity.

Anna Tian · January 26, 2013, 15:03

Quote:

Originally Posted by evcelica

I believe that "mean velocity" should be the local mean velocity, or just the local velocity for steady state, not the global mean velocity.

But could CFX post output that?

January 22, 2013, 13:22	Could CFX-post output turbulence intensity?	#1
Anna Tian Senior Member Meimei Wang Join Date: Jul 2012 Posts: 494 Rep Power: 15	Hi, May I ask could CFX-post output turbulence intensity directly?(I didn't find that output variable option.) Or I have to compute it manually by myself? Thank you. __________________ Best regards, Meimei

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January 23, 2013, 02:18		#2
siw Senior Member Stuart Join Date: Jul 2009 Location: Portsmouth, England Posts: 733 Rep Power: 25	I have not found it there myself so I made an expression using the turbulent kinetic energy and the mean velocity, see the wiki page for the equations: http://www.cfd-online.com/Wiki/Turbulence_intensity

January 24, 2013, 16:20		#3
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,167 Rep Power: 23	I believe that "mean velocity" should be the local mean velocity, or just the local velocity for steady state, not the global mean velocity.