CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum


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

LinkBack Thread Tools Display Modes
Old   June 29, 2005, 13:03
Default Gradients...
Posts: n/a
The below message was posted some months ago:

"i know that the local rate of strain (a) effects the flame characteristics, i.e. extinction etc.

but which direction of strain (e.g. S11, S22, S33, S12, S13, S23) in an LES or DNS simualation actually has the effect. is it the magnitude of all strain directions or one in particular?!?!?

basically i think i want to know the relationship between 'a' and 'Sij'. "

I am aware the answer to this is the strain the direction normal to the flame. Now, how would I calculate this is I new the Sij components and the Scalar normal components....? Can someone write it down in tensor or vector notation for me..?

thank you.
  Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Output of velocity gradients wersoe OpenFOAM Programming & Development 10 March 31, 2014 20:57
Velocity Gradients or Pressure Gradients? owayz OpenFOAM 9 August 14, 2012 13:09
Large pressure gradients = anisotropy??? cfd_enthusiast Main CFD Forum 0 February 9, 2010 12:09
density gradients in CFX post prabhu CFX 1 June 12, 2006 06:47
extract velocity gradients with cfx4.2 franco belosi CFX 1 November 28, 2002 19:41

All times are GMT -4. The time now is 14:32.