CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > CFX

Use of Tu for user expression

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 7, 2006, 08:55
Default Use of Tu for user expression
  #1
Adam
Guest
 
Posts: n/a
Has anyone successfully used the turbulence intenstity (Tu) in a user expression or subroutine?

Even though it is a user input option it doesn't seem possible for the user to utilise it in any expression or routine.

Regards

Adam
  Reply With Quote

Old   August 8, 2006, 04:21
Default Re: Use of Tu for user expression
  #2
James Date
Guest
 
Posts: n/a
Why don't you set it as a constant in the CEL expression language and then you can use it anywhere, even to set Tu on the inlet boundary. You could set up the following CEL expressions, which will allow you to calculate Tu and Epsilon:

UsrFlowSpeed = 10 [m s^-1]

UsrChord = 1.0 [m]

UsrDynamicViscosity = 0.0016 [kg m^-1 s^-1]

UsrDensity = 1028 [kg m^-3]

UsrTurbIntensity = 0.003

UsrInletK = 3.0*((UsrTurbIntensity^2)*UsrFlowSpeed^2)/2.0

UsrInletEpsilon = 0.085*UsrDensity*UsrInletK^2/ 10*UsrDynamicViscosity)

I hope this is useful.

James

  Reply With Quote

Reply


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Problem About Running Fluent In Linux mitra FLUENT 18 June 20, 2019 03:11
How to install CGNS under windows xp? lzgwhy Main CFD Forum 1 January 11, 2011 19:44
CGNS lib and Fortran compiler manaliac Main CFD Forum 2 November 29, 2010 07:25
Lift, Drag Vs time chart,calculations Jamesd69climber CFX 8 February 17, 2005 18:23
Creating, loop or iteration using expression edito Jan CFX 3 July 28, 2003 12:01


All times are GMT -4. The time now is 21:49.