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

Discontinuity at water level in stratified 2 phase flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 13, 2012, 08:15
Default
  #21
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,277
Rep Power: 96
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Simply go to the domain tab and define an initial condition. Or use the global initialisation tab.

If you just want to quickly evolve the flow to a pseudo-steady state flow then use your best steady state run as an intial condition.
ghorrocks is offline   Reply With Quote

Old   June 13, 2012, 08:33
Default
  #22
Senior Member
 
kbaker's Avatar
 
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 129
Rep Power: 9
kbaker is on a distinguished road
I not understand how to set an initial condition for the domain? I went to default domain then activate initialisation but still get the same warning?
kbaker is offline   Reply With Quote

Old   June 13, 2012, 08:36
Default
  #23
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 12,277
Rep Power: 96
ghorrocks is a jewel in the roughghorrocks is a jewel in the roughghorrocks is a jewel in the rough
Have a look at some of the CFX tutorials which cover a transient simulation. See how they set up the initial conditions.
ghorrocks is offline   Reply With Quote

Old   June 13, 2012, 08:52
Default
  #24
Senior Member
 
kbaker's Avatar
 
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 129
Rep Power: 9
kbaker is on a distinguished road
well if you read the warning message it as below:
Transient analyses require that initial conditions are specified unless an Initial Values file is specified at run-time
I am wondered where the initial values file I did not create any values file during the simulation? I also create an intermediate file for the results from output control but warning still exist and the run cannot start?

Last edited by kbaker; June 13, 2012 at 09:13.
kbaker is offline   Reply With Quote

Old   June 14, 2012, 07:37
Default
  #25
Senior Member
 
kbaker's Avatar
 
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 129
Rep Power: 9
kbaker is on a distinguished road
In order I transform the problem to unsteady I aware that I need to transform the analysis type to transient? Is there any steps I need to follow before applying the previous step? I check all the steps in transient tutorials nothing mentioned and I never apply it but I still cannot run my case file and the previous warning message still exist?
kbaker 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
two phase slug flow Justion FLUENT 4 June 5, 2014 10:47
Two Phase Flow Problem miner15kick CFX 5 October 28, 2010 18:03
Two phase T-junction pipe flow Viscous model Kortels FLUENT 0 September 10, 2010 06:18
Stratified Oil-water Flow simulation Mijail FLUENT 2 May 18, 2009 20:20
How to set volume fraction in two phase flow Kamel FLUENT 2 March 23, 2007 01:06


All times are GMT -4. The time now is 01:46.