CFD Online URL
[Sponsors]
Home > Forums > CFX

immiscible flow simulation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   June 8, 2010, 18:17
Unhappy immiscible flow simulation
  #1
New Member
 
Join Date: Sep 2009
Posts: 5
Rep Power: 7
jellio is on a distinguished road
Hi,
I am working on a two-three immiscible flow simulation in a microchannel, i.e., oil and water (half and half), when i using multiphase flow in CFX-12, how could I select the fluid pair, and fluid model?

I run some cases, but in the CFX-post, it seems two different velocity fields based on the two fluid are in the same shape (only the values are different), the interface did not have any influence on the fluid flow field. The two fluids' velocity supposed to be the same in the interface and thus change the channel fluid field.

Any suggestions?

thanks
jellio is offline   Reply With Quote

Old   June 8, 2010, 19:19
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 9,879
Rep Power: 78
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
Have a look at the tutorial examples. Free surface flow over a bump will show you how to set this type of problem up.
ghorrocks is offline   Reply With Quote

Old   June 9, 2010, 16:24
Default
  #3
New Member
 
Join Date: Sep 2009
Posts: 5
Rep Power: 7
jellio is on a distinguished road
Quote:
Originally Posted by ghorrocks View Post
Have a look at the tutorial examples. Free surface flow over a bump will show you how to set this type of problem up.

Thanks for your replying, when I use a inlet velocity boundary condition, there is no much problems. However, when I use pressure boundary condition in the inlet, the two fluid messed up, mix together very quick! any one have similar experience, thanks!
jellio is offline   Reply With Quote

Old   June 9, 2010, 19:33
Default
  #4
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 9,879
Rep Power: 78
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
You have to specify the fluid level somehow. If you do nothing it will assume the fluids are evenly mixed across the inlet. The example shows how to specify the fluid level.
ghorrocks is offline   Reply With Quote

Reply

Tags
immiscible fluid flow

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
Domain format problem on airfoil flow simulation andrenonaka CFX 6 December 4, 2014 04:57
Channel flow setup in Large-eddy simulation Weihua Main CFD Forum 5 January 24, 2012 06:16
Incompressible to compressible flow simulation Nishikant Tamrakar FLUENT 10 June 16, 2009 22:09
Compressible Flow Simulation - business jet Tyler FLUENT 0 March 13, 2009 16:47
Natural convection - Inlet boundary condition max91 CFX 1 July 29, 2008 21:28


All times are GMT -4. The time now is 02:37.