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

Natural Convection

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 26, 2005, 15:25
Default Natural Convection
  #1
Kaiser Matin
Guest
 
Posts: n/a
For hex mesh what should be the convergence control relaxation factors. The default settings are too slow to converge. I think sI read somewhere that second order upwinding would be better. But I don't have the book with me right now. Any suggestions for fast convergence schemes for natural convection? Thanks.
  Reply With Quote

Old   August 29, 2005, 12:17
Default Re: Natural Convection
  #2
Evan Rosenbaum
Guest
 
Posts: n/a
We always increase underrelaxations for energy to 0.98 and body force to 0.85 or higher. These drive the solution in buoyancy and are most critical in natural convection problems.
  Reply With Quote

Reply

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
natural convection problem with radiation jorien CFX 0 October 14, 2011 09:26
Natural Convection with heat generation krishnachandranr Main CFD Forum 0 July 28, 2009 04:22
Coupled vs Seg - Natural vs. Forced Convection Alex CD-adapco 5 December 12, 2007 05:58
natural convection at high Rayleigh mauricio FLUENT 2 February 23, 2005 20:43
Mixing By Natural Convection Processes Greg Perkins FLUENT 0 February 12, 2003 19:40


All times are GMT -4. The time now is 16:33.