CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Fluent UDF and Scheme Programming

about DEFINE_SOURCE(name, c, t, dS, eqn)

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

Reply
 
LinkBack Thread Tools Display Modes
Old   March 28, 2009, 10:01
Default about DEFINE_SOURCE(name, c, t, dS, eqn)
  #1
New Member
 
liuxiao
Join Date: Mar 2009
Posts: 10
Rep Power: 8
lx33101128 is on a distinguished road
dear all
the UDF manual says that the dS is the source term derivative. Does this term is indispensable or optional? it seems that this term is just used to aid stability, but i am not sure. in my case, if dS was added, the converging rate was very very very slow. howerver, if i didn't set the value of dS, the rate is very rapid.look forward to you reply!!
lx33101128 is offline   Reply With Quote

Old   March 31, 2009, 09:21
Default
  #2
Member
 
Henrik Ström
Join Date: Mar 2009
Posts: 32
Rep Power: 8
HenrikS is on a distinguished road
It is optional, and should be included if it helps convergence, as far as I understand.
HenrikS is offline   Reply With Quote

Old   March 31, 2009, 21:41
Default
  #3
New Member
 
liuxiao
Join Date: Mar 2009
Posts: 10
Rep Power: 8
lx33101128 is on a distinguished road
thanks very much
lx33101128 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
Sudden/random deviation of poisson eqn results zonexo Main CFD Forum 1 December 11, 2006 05:21
Multigrid or Krylov subspace for poisson eqn zonexo Main CFD Forum 1 May 5, 2006 03:26
why compressible flow solving isnt need energy Eqn starPlatinum Main CFD Forum 1 July 21, 2003 10:15
UDFs for Scalar Eqn - Fluid/Solid HT Greg Perkins FLUENT 0 October 13, 2000 23:03
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 21:32.