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

2 fluid transient model

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

Reply
 
LinkBack Thread Tools Display Modes
Old   August 11, 2005, 21:32
Default 2 fluid transient model
  #1
Jared
Guest
 
Posts: n/a
I have a model with air flowing through a nozzle at a high velocity into a large volume of water. The model does one quick iteration and then has gone a couple days without doing another one. Thoughts or suggestions on what is going on or what to do?
  Reply With Quote

Old   August 30, 2005, 02:36
Default Re: 2 fluid transient model
  #2
afiz
Guest
 
Posts: n/a
Maybe you can play around with the no. of subcycles and timestep.I also face this problem.However, i still unable to solve it.At first, there's only one iteration.Once i change the timestep, i managed to get 4 iterations...in two days! Anybody can help us with this??
  Reply With Quote

Old   August 30, 2005, 03:16
Default Re: 2 fluid transient model
  #3
zxaar
Guest
 
Posts: n/a
i have never used starCD but i think it may be related to maximum number of iterations it can perform at each level of amg, usually it is set to 30,

but if this is the case then it clearly says that solver is not able to converge it to the level specified and is trying to do so. changing the time step will help in such cases. If i were you i might have gone with time step as small as 1.0E-05 or 5E-06 seeing your case.

I am not sure how much i made sense here, hope it will be useful.
  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
model ignite transient process linda FLUENT 1 September 12, 2013 23:33
Transient Rotor Stator Model Farid CFX 2 May 23, 2008 21:37
Transient Model, Varying Mesh files... Erich CFX 7 September 11, 2007 10:15
Turbulence Model for Transient Incompressible flow astro1 Main CFD Forum 5 May 5, 2007 11:07
TRANSIENT MODEL BNLOO CD-adapco 1 June 18, 2001 06:44


All times are GMT -4. The time now is 21:13.