CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

heat generation rate in the wall boundary conditions, what this?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 10, 2015, 13:14
Default heat generation rate in the wall boundary conditions, what this?
  #1
Member
 
Serguei
Join Date: Mar 2015
Posts: 33
Rep Power: 7
serguei is on a distinguished road
Hi all,
If anybody may clarify, please: in thermal wall boundary conditions, the “heat generation rate” option relates to the heat generation where? In fluid or in solid domain? Is that heat generation in the fluid volume by the hot solid wall?
Thank you
serguei is offline   Reply With Quote

Old   September 10, 2015, 14:20
Default
  #2
Senior Member
 
Lucky Tran
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 4,034
Rep Power: 48
LuckyTran has a spectacular aura aboutLuckyTran has a spectacular aura about
It's the volumetric heat generation rate in the (solid) wall. It only works if you specify a wall thickness. It is part of the thin wall model, which is also used for modelling thermal resistances.

If you do use it, note that the normal wall boundary conditions are applied to the backside. That is, you can specify the backside wall heat flux or backside wall temperature with volumetric heat generation across a thin layer so that the temperature at the solid-fluid boundary may be less than the temperature that you specify as the wall boundary condition.
LuckyTran is offline   Reply With Quote

Old   September 10, 2015, 17:02
Default
  #3
Member
 
Serguei
Join Date: Mar 2015
Posts: 33
Rep Power: 7
serguei is on a distinguished road
thank you,
but is there any way to generate the heat in the fluid domain, from some external source?
I don't care about the nature that source, what it do - generates the heat with known rate (w/m3)
serguei is offline   Reply With Quote

Old   September 10, 2015, 17:24
Default
  #4
Member
 
Serguei
Join Date: Mar 2015
Posts: 33
Rep Power: 7
serguei is on a distinguished road
and when you are talking about "backside", do you mean the outer wall surface, which is in contact with fluid?
serguei is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Wrong flow in ratating domain problem Sanyo CFX 17 August 15, 2015 07:20
Error finding variable "THERMX" sunilpatil CFX 8 April 26, 2013 08:00
RPM in Wind Turbine Pankaj CFX 9 November 23, 2009 05:05
Concentric tube heat exchanger (Air-Water) Young CFX 5 October 7, 2008 00:17
Water vapour condensation in CFX-5.7.1 hdj CFX 1 November 27, 2005 08:15


All times are GMT -4. The time now is 15:15.