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

calculating shear rate

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 21, 2012, 14:49
Default calculating shear rate
  #1
Senior Member
 
hamid
Join Date: Nov 2010
Posts: 185
Rep Power: 15
hamid1 is on a distinguished road
Hi
Haw can i calculate shear rate in cfd-post, or in fluent,?
and what is the meaning of velocity u.gradient y ?

thanks so much
hamid1 is offline   Reply With Quote

Old   August 22, 2012, 06:08
Default
  #2
Senior Member
 
Join Date: Aug 2011
Posts: 421
Blog Entries: 1
Rep Power: 21
blackmask will become famous soon enough
you can find it in fluent via contours ... -> derivatives ... -> strain rate

velocity dot gradient y = velocity component in y-direction
blackmask is offline   Reply With Quote

Old   August 22, 2012, 06:31
Default
  #3
Senior Member
 
hamid
Join Date: Nov 2010
Posts: 185
Rep Power: 15
hamid1 is on a distinguished road
thank you so much, yes it works, .. however I am wondering if still I can use "velocity u.gradient y" as "dUx/dy" in CFD-Post, if so, would you please let me know why the unit does not pop up in drop down menu in cfd-post for "velocity u.gradient y"
Thank you again
hamid1 is offline   Reply With Quote

Old   August 22, 2012, 22:56
Default
  #4
Senior Member
 
Join Date: Aug 2011
Posts: 421
Blog Entries: 1
Rep Power: 21
blackmask will become famous soon enough
Sorry, I thought you were asking an mathematical expression $u\cdot\nabla y$ which results in the y-component of velocity. In CFD-Post, "velocity u.gradient y" is a CEL expression and represents "dUx/dy", as you have mentioned.

You should click the ellipsis (..., indicating more variables) beside the drop-down list to get this variable.
blackmask is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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
Shear Strain Rate Dave442 Main CFD Forum 5 October 25, 2013 05:08
What is wall shear stress and shear strain rate? warlocklw Main CFD Forum 2 May 21, 2012 07:16
Turbulent viscosity and shear rate shib FLUENT 0 June 22, 2010 13:44
Calculating average wall shear? Joe CFX 3 March 17, 2007 10:42
How to update polyPatchbs localPoints liu OpenFOAM Running, Solving & CFD 6 December 30, 2005 18:27


All times are GMT -4. The time now is 00:39.