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

Heat Transfer Coefficient

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

Reply
 
LinkBack Thread Tools Display Modes
Old   May 28, 2013, 13:31
Default Heat Transfer Coefficient
  #1
New Member
 
Join Date: Mar 2010
Posts: 4
Rep Power: 7
AndBra is on a distinguished road
Hi!
Might be a stupid question, but I have not been able to find the answer to it.
How does Fluent calculate the convective heat transfer between a fluid and a solid? Usually for convective heat transfer a heat transfer coefficient (HTC) is needed, but this is (as far as I know) not available in Fluent. One can get an approximation of the HTC, but fr that you need to specify a fixed reference temperature and the HTC is calculated based on this temperature, the wall temperature and the heat flux. But how does it get the heat flux to start with?

Sorry if it's a "basic" question, but I would really appreciate if someone has the answer or can point me in a direction where I can find it.
AndBra is offline   Reply With Quote

Old   May 29, 2013, 03:16
Default
  #2
Member
 
Musango Lungu
Join Date: Dec 2011
Location: China
Posts: 73
Rep Power: 5
Musa is on a distinguished road
Heat transfer coefficient between a solid and particle is calculated using two correlations available in FLUENT i.e. Ranz-Marshall and Gunn correlations. However to access these you must first enable the heat equation in the model tab and specify the thermo physical properties of the phases. There is no input for heat flux because the htc is calculated from the Nusselt correlation as given by Ranz-Marshall and Gunn.
Musa is offline   Reply With Quote

Old   June 4, 2013, 15:35
Default
  #3
Senior Member
 
Join Date: Mar 2009
Location: Indiana, US
Posts: 185
Rep Power: 8
delaneyluke is on a distinguished road
If you fluid-solid interface is an interior (conjugate heat transfer) then the heat flux is calculated from the energy transport equation between solid and fluid.
If the interface is a wall (you've not modeled the solid) then you need to define either a temperature or an htc on that wall and heat flux is calculated from them.

Regards
Luke
delaneyluke is offline   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
Heat Transfer Coefficient Alberto Schroth FLUENT 12 January 16, 2014 04:40
Heat flux and Heat transfer coefficient sakil2k3 FLUENT 3 May 9, 2013 21:42
Heat Transfer Coefficient in Compressible Flow 3D turbine cascade Karkoura CFX 0 March 10, 2011 16:35
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
Heat Transfer Coefficient los OpenFOAM Running, Solving & CFD 5 January 31, 2010 18:44


All times are GMT -4. The time now is 06:46.