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

Thermal Conditions for Two-Sided Walls

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 6, 2005, 12:36
Default Thermal Conditions for Two-Sided Walls
  #1
Tomm
Guest
 
Posts: n/a
Is anybody knowing how to introduce convection heat transfer on wall of a solid heated by flowing hot gas.This solid of cylindrical form is placed inside the tube.This hot gas flows inside this tube.
  Reply With Quote

Old   December 6, 2005, 16:50
Default Re: Thermal Conditions for Two-Sided Walls
  #2
AJG
Guest
 
Posts: n/a
Tomm, there is a tutorial in fluent where u simulate an airfoil, in this tutorial u draw as ur domain "the gas" that flows around the airfoil, I think it woulb be the same thing with ur problem. You have to draw a big area basically around ur cylinder and grid this area and considering the surface of ur cylinder as a wall, then in Fluent pick the right solver to do the thermal analysis.

Check the tutorial that I'm talking about and probably it would make more sense to you my explanation.

AJG
  Reply With Quote

Old   December 7, 2005, 05:45
Default Re: Thermal Conditions for Two-Sided Walls
  #3
Tomm
Guest
 
Posts: n/a
Thanks a lot, but it is not the same promblem as I have.Mine cylinder inside tube conduct energy.This cylinder is not empty,it has grid also.Ambient gas in tube flows from inlet to outlet with inlet temperature 1000K.I want to include convection model on wall of cylinder: alfa*(Tsurface-Tfluid) Fluent contains "two-sided models".I can turn on coupled or uncoupled under thermal condiction.Main assumptions is: this model does not contains convection and radiation phenomena on wall which has solid and fluid region on each side.I have tourned on coupled option under thermal condiction but this way is not perfect.Coupled model is good in case when laminar layer is very small, it means alfa coefficient is very high.If you have any sugestion I will be very gratful to You. Tomm.
  Reply With Quote

Old   December 8, 2005, 03:03
Default Re: Thermal Conditions for Two-Sided Walls
  #4
Shiju G.Thomas
Guest
 
Posts: n/a
Hi tom...

mmmm..I think coupled condition should be working well there...If u r planning to deifine the wall with a heat transfer coefficient value, then there is no need to simulate the gas flow.
  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
Water subcooled boiling Attesz CFX 7 January 5, 2013 04:32
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Convective Heat Transfer - Heat Exchanger Mark CFX 6 November 15, 2004 16:55
Short Course: Computational Thermal Analysis Dean S. Schrage Main CFD Forum 11 September 27, 2000 17:46
A problem about setting boundary conditions lyang Main CFD Forum 0 September 19, 1999 18:29


All times are GMT -4. The time now is 04:17.