CFD Online Logo CFD Online URL
Home > Forums > FLUENT

UDF Time-dependent term in source

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

LinkBack Thread Tools Display Modes
Old   October 16, 2009, 11:25
Default UDF Time-dependent term in source
New Member
Join Date: Sep 2009
Posts: 14
Rep Power: 8
Ronnfors is on a distinguished road

I am using Fluent and UDF to do my simulations.

In my source term for energy equation, there is a time-dependet term df/dt along with other terms depending on space i.e. du/dx

Gradient calculation in UDF is straight forward i.e. C_U_G(c,t)[0] and that is in space.

what about time? is there any nice commands like that or do I have to do my own first/second-order approximations of the term by calling the scalar at previous/earlier time steps?

Does anyone has something to share on this topic?
Thank you
Ronnfors is offline   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
UDF Source Term Christian FLUENT 4 August 1, 2009 05:53
DxFoam reader update hjasak OpenFOAM Post-Processing 69 April 24, 2008 01:24
PDE in udf for defining momentum source term shekhar FLUENT 0 April 12, 2004 01:43
UDF about source term tian FLUENT 3 May 2, 2003 09:17
UDFs for Scalar Eqn - Fluid/Solid HT Greg Perkins FLUENT 0 October 11, 2000 03:43

All times are GMT -4. The time now is 00:13.