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

Simple heat transfer problem....Desperate for help

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 16, 2005, 00:05
Default Simple heat transfer problem....Desperate for help
  #1
abong
Guest
 
Posts: n/a
Hi all,

I am at my wits' end. I need to study heat transfer through a chimney.

Up till now, I have tried all sorts of methods...but i just couldn't get my flow going.

I am doing a 2D modeling.

Anyone can help me by suggesting way to model the heat source?

I tried specifying the bottom wall as the boundary condition, with a heat flux value. I tired inserting a radiator at the base of the chimney.

Anyone have any suggestion as to how i can heat up my flow at the base of the chimney??

Millions of thanks to whoever that helps me.
  Reply With Quote

Old   February 17, 2005, 06:41
Default Re: Simple heat transfer problem....Desperate for
  #2
JB
Guest
 
Posts: n/a
Hi,

what kind of chimney? (materials, shape, etc..) what are your assumptions?
  Reply With Quote

Old   February 17, 2005, 11:08
Default Re: Simple heat transfer problem....Desperate for
  #3
ocy
Guest
 
Posts: n/a
Hi JB, Thanks for your reply.

It's a chimney made of concrete. The shape will be rectangle in 2D. The wall will be insulated.

That's all. As simple as it sounds, but i can't get it work.

Hope you can bring some light to me. Thanks!
  Reply With Quote

Old   February 17, 2005, 12:08
Default Re: Simple heat transfer problem....Desperate for
  #4
JB
Guest
 
Posts: n/a
Ok,

I never had to modelize free convection, but I guess that's what it is.... I think you should define at one point 2 temperatures: 1 would be the temperature of your oven, or whatever. the other one would be the outside temperature. I don't know anything about how to modelize free convection, but I'm sure you can find some data on the web Hope this will help!

cheers jb
  Reply With Quote

Old   February 17, 2005, 22:49
Default Re: Simple heat transfer problem....Desperate for
  #5
ocy
Guest
 
Posts: n/a
thanks JB,

My heat source has to be specified by either a constant heat flux or heat generation rate, not by constant temp.

Anyway, thanks for ur help
  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
inverse heat transfer problem siva0182 FLUENT 1 January 29, 2012 09:23
Heat transfer problem seojaho CFX 6 May 6, 2010 00:32
Conjugate heat transfer problem hvem10 FLUENT 2 October 29, 2009 18:31
How can I increase Heat Transfer at Domain Interf? B.Simon CFX 3 October 28, 2008 19:53
facing problem in heat transfer coefficient dhiraj CFX 1 May 7, 2007 09:08


All times are GMT -4. The time now is 17:45.