CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Free Convection

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

LinkBack Thread Tools Display Modes
Old   July 13, 2000, 18:17
Default Free Convection
Posts: n/a

I am just woundering how good fluent 4.5 & 5.0 itself is, in modeling free convection, when you effectively have no inflow/outflow bounday condition except for wall BCs. Is fluent 4.5 & 5.0 capable of modelling such flow?.


  Reply With Quote

Old   July 13, 2000, 21:17
Default Re: Free Convection
Jin-Wook LEE
Posts: n/a
Dear Oliver

As far as my experience is concerned, you can model free convection by both Fluent 4.5 and Fluent 5.0.

For free convection with low Rayleigh number laminar flow(say, Ra < 1.e6), both of 4.5 & 5.x have shown good convergence. For high Rayleigh number laminar flow and turbulent flow(say, Ra > 1.e8), Fluent 4.5 has shown very good convergence than Fluent 5.x. And if you have convergence problem for high Rayleigh number flow, you might have good convergence if you use time-marching method.

The above Rayleigh number is based on free convection in the square cavity.

Sincerely, Jinwook
  Reply With Quote

Old   July 14, 2000, 13:15
Default Re: Free Convection
Posts: n/a

  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
Free Stream Temperature in natural convection problem tomcatbobby FLUENT 2 January 27, 2011 06:41
URGENT!!!! Combined free convection Mahyar FLUENT 0 August 13, 2008 00:39
CFX-5.5 simulating air free convection Dustin Lee CFX 0 April 16, 2003 02:54
Free Convection in STAR-CD George Hampel CD-adapco 0 November 16, 2000 00:38
free convection heat transfer from a heated horizontal surface through a liquid to a thin cooled fin Kaushik FLUENT 1 May 8, 2000 06:47

All times are GMT -4. The time now is 20:03.