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

Simulating a Supersonic Diffuser-Need Help

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 17, 2002, 04:53
Default Simulating a Supersonic Diffuser-Need Help
  #1
Dileep
Guest
 
Posts: n/a
Hi friends, I face problems in simulating a supersonic diffuser flow. I use a UNS FVM solver. The inlet mach no. is 3.5 and no condition is specified in the down stream side(pressure extrapolated). The diffuser is supposed to be of proper dimensions with a straight long throat. Still the flow has not become subsonic or no shock is formed. The exit pressure is above the expected value. My doubts are:i) Should I specify the subsonic conditions at the down stream side? ii) How can I implement that? iii) If I specify the exit pressure will it simulate the real situation? Could any one give some help?? Thanks.. Dileep.
  Reply With Quote

Old   April 18, 2002, 06:25
Default Re: Simulating a Supersonic Diffuser-Need Help
  #2
Jitendra
Guest
 
Posts: n/a
Hi Dileep,

You can implement a boundary condition which can check every iteration whether the live cell Mach no at the exit is subsonic and supersonic. It should apply pressure for subsonic case else go for extrapolation.

Note : Not the expert's comments ... any other suggestions... please enlighten me also.

Regards,

Jitendra
  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
Probelm with supersonic exhaust to ambient newj CFX 2 August 9, 2012 18:01
Flow in Supersonic MHD Channel Antanas CFX 6 February 13, 2012 15:49
Supersonic Combustion Andrew FLUENT 1 March 16, 2011 07:00
turbulence model for separated flow in diffuser Martis STAR-CCM+ 0 March 2, 2010 03:08
CFD code for supersonic flows hedy Main CFD Forum 9 April 16, 2007 10:56


All times are GMT -4. The time now is 11:45.