CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Solve Flow or VOF simultaneously ?

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   February 16, 2011, 09:19
Default Solve Flow or VOF simultaneously ?
  #1
New Member
 
Ramsey
Join Date: Jan 2011
Posts: 2
Rep Power: 0
Ramsey is on a distinguished road
Dear Fluent user ,
I am modelling 2phases (gas jet+water) VOF Model, I have two "Velocity Inlet" Boundary conditions, one for the gas phase and the other for water..
I Need to know If i should first solve only gas flow (in solve control solution) until i get convergence, then I switch solve VOF , Or solve Flow and VOF simultaneously...? In this case it is very difficult to get convergence..
Thanks
Fred
Ramsey is offline   Reply With Quote

Old   February 16, 2011, 14:16
Default
  #2
Senior Member
 
kbaker's Avatar
 
Khalid Baker
Join Date: Mar 2009
Location: IRAQ
Posts: 168
Rep Power: 17
kbaker is on a distinguished road
Quote:
Originally Posted by Ramsey View Post
Dear Fluent user ,
I am modelling 2phases (gas jet+water) VOF Model, I have two "Velocity Inlet" Boundary conditions, one for the gas phase and the other for water..
I Need to know If i should first solve only gas flow (in solve control solution) until i get convergence, then I switch solve VOF , Or solve Flow and VOF simultaneously...? In this case it is very difficult to get convergence..
Thanks
Fred
If you switch off VOF in solution control i think you stopped the whole VOF model because the vof equations not be solved hence you need to select the vof equation in control solution. About convergence start with small time steps untill your solution be stable and use small descrtization factors hope this work well with you.

Regards
kbaker
kbaker is offline   Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Annular Flow Using VOF TedBrogan FLUENT 4 January 1, 2016 05:31
Air-water flow (VoF). Need help :( Luke1984 FLUENT 6 October 19, 2009 10:59
SLUG flow with Two fluid model and VOF MIJAIL Main CFD Forum 2 February 21, 2008 11:45
solve the compressible flow in microchannel? sandernagoo Main CFD Forum 10 July 29, 2002 10:22
Inviscid Drag at subsonic, subcritical Mach # Axel Rohde Main CFD Forum 1 November 19, 2001 13:19


All times are GMT -4. The time now is 15:51.