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

compressible and incompressible flow

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

Reply
 
LinkBack Thread Tools Display Modes
Old   November 8, 2008, 00:39
Default compressible and incompressible flow
  #1
chinababu
Guest
 
Posts: n/a
i am trying to solve one problem having both compressible (air-ideal gas) and incompressible (water) fluids and the solution is not converging but when we have taken both the fluids (air &water) as incompressible fluids, the solution is converging. Can you tell what the problem in giving conditions was and how to handle the problem if we are having compressible and incompressible fluids using simultaneously?
  Reply With Quote

Old   November 8, 2008, 04:52
Default Re: compressible and incompressible flow
  #2
mahi
Guest
 
Posts: n/a
You can try a density based solver. I think you are using a pressure based solver
  Reply With Quote

Old   November 9, 2008, 00:36
Default Re: compressible and incompressible flow
  #3
peterliu
Guest
 
Posts: n/a
what do your boundary conditions for your outlet ? try to use pressure out-let.
  Reply With Quote

Old   November 11, 2008, 12:16
Default Re: compressible and incompressible flow
  #4
Amod@Siemens
Guest
 
Posts: n/a
So long MAch number for air (the compressible) media is < 0.3, you can always treat it Incompressible without loss of acccuracy!

What phenomena (application) are you trying to solve!
  Reply With Quote

Old   November 13, 2008, 05:56
Default Re: compressible and incompressible flow
  #5
mahi
Guest
 
Posts: n/a
Dude, try a pressure based coupled solver. It might work in your case. Give air as compressible and water as incompressible phases
  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
Incompressible and compressible flow. Confused student. Main CFD Forum 22 January 30, 2014 06:32
NS-incompressible and compressible flow solvers ag Main CFD Forum 2 September 27, 2005 06:18
using compressible options in incompressible flow Kali Charan Nayak CFX 2 August 10, 2005 00:42
Incompressible and compressible flow. John. Main CFD Forum 1 December 15, 2004 11:29
Incompressible and compressible flow boris FLUENT 0 February 20, 2002 03:08


All times are GMT -4. The time now is 11:29.