CFD Online Logo CFD Online URL
Home > Forums > FLUENT

anisotropic thermal conductivity, please help!

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

LinkBack Thread Tools Display Modes
Old   June 8, 2006, 21:08
Default anisotropic thermal conductivity, please help!
Posts: n/a
Hi everybody, Here is my problem: I want to change the diffusive term of the energy equation in fluent, since i want to use the anisotropic thermal conductivity, in order to do this, i set the thermal conductivity to be zero in the materials panel, and put my own diffusive terms in the source term, so the second derivatives of temperature are needed for calculating the diffusive terms, according to the UDF HELP of Fluent, i obtain the temperature second derivatives with respect to x and y directions by setting the first-derivatives of the temperature to two UDS (e.g. dt/dx=UDS_0 and dt/dy=UDS_1)through defined Macro: DEFINE_ADJUST, then i used the first derivatives of UDS_0 and UDS_1 to get the second derivatives of temperature:d2t/dx2=dUDS_0/dx and d2t/dy2=dUDS_1/dy in my own source terms for energy equation with different thermal conductivities in x and y directions, but the calculated results is very unrealistic, i don't know where is the problem and how to revise these, please help me, thanks in advance.

best regards GBLiu.
  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
Anisotropic thermal conductivity in an insulated stranded coil Attesz CFX 4 April 4, 2011 11:08
thermal conductivity --> anisotropic material val46 OpenFOAM 3 July 20, 2010 08:19
Anisotropic thermal conductivity suitup OpenFOAM 0 April 29, 2010 07:20
Anisotropic Thermal Conductivity Saturn CFX 4 January 30, 2007 13:34
anisotropic thermal conductivity Lugdi Siemens 0 January 15, 2007 09:03

All times are GMT -4. The time now is 23:25.