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

Inverse degassing condition?

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

Reply
 
LinkBack Thread Tools Display Modes
Old   January 5, 2010, 08:22
Default Inverse degassing condition?
  #1
New Member
 
Boris
Join Date: Dec 2009
Posts: 4
Rep Power: 7
Boris is on a distinguished road
Hi all,

I'm trying to model a gas/liquid cyclone with liquid loadings up to 20%. Hence the gas will be the continuous phase in all cases. In the bottom part I have a fixed amount of liquid, so I can use rho*g*h as a pressure boundary condition at the bottom outlet.
At the top outlet I'm looking for some kind of inverse degassing condition. I want this outlet to behave like an outlet for the continuous phase (gas), but the for dispersed phase (liquid) it has to behave as a (free slip) wall. The standard degassing condition is only able to do the opposite (outlet for dispersed phase and wall for continuous phase).
Could anyone tell me if this is possible? Any other recommendations on the boundary conditions are welcome as well.

regards,
Boris
Boris is offline   Reply With Quote

Old   January 5, 2010, 13:25
Default
  #2
Member
 
Join Date: Mar 2009
Posts: 48
Rep Power: 8
John is on a distinguished road
One option may be using a porous media model--put high resistance on liquid phase and no resistance on gas phase.

Last edited by John; January 6, 2010 at 09:36.
John 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
Degassing boundary condition in Fluent? srjp FLUENT 2 August 18, 2011 08:46
About degassing boundary condition superqtp FLUENT 0 September 8, 2009 05:24
Degassing boundary condition Ayman Dohdoh FLUENT 0 October 28, 2007 05:41
Degassing Condition.......Please Help Paresh Jain CFX 1 February 19, 2004 13:19
Degassing Boundary Condition ???? thomas CFX 2 February 12, 2004 03:59


All times are GMT -4. The time now is 06:57.