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

hypersonic flow simulation

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 2, 2008, 18:48
Default hypersonic flow simulation
  #1
tamjid
Guest
 
Posts: n/a
hi fellows,

i cannot see the entropy contour of my solution. Following error is showing...........

Error: cellEntropy: Reference Pressure Value is set to zero in the Reference Values panel!!

i set pressure zero in the operating conditions.

which panel is the reference value panel.

please help.
  Reply With Quote

Old   September 3, 2008, 12:54
Default Re: hypersonic flow simulation
  #2
Jason B
Guest
 
Posts: n/a
Report->Reference Values

You should set these every time.

Good luck, Jason
  Reply With Quote

Old   March 26, 2010, 06:49
Default
  #3
New Member
 
raul
Join Date: Nov 2009
Posts: 13
Rep Power: 16
rudy is on a distinguished road
Hi,
I am simulating hypersonic flow from nozzle with finehexa25_4 version.I have couple of problems with that.

In the beginning I ran my simulation with perfect gas with default value of conductivity of 0.1 which is quite high. My simlations are working with this value but as for now I am taking perfect air as a working fluid with Prandtle number specified instead of constant conductivity and now I have some stability problem even if I am using the same setting as before.Can anyone tell me what's happening here...

Secondly I am using dual time stepping for time integration and multigrid is not working for me.Whenever I use multigrid technique the solution diverges.Can anyone tell me what can be the reason for that?...According too me multigrid should work irrespective of the flow speed so apparently there shouldn't be a problem with multigrid method while simulating hypersonic flow.

Can any one explain anything about above problems please?...
Thanks in advance,
regards,
rudy.
rudy 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
hypersonic flow simulation tamjid Main CFD Forum 1 September 2, 2008 00:46
Hypersonic Flow Simulation tamjid FLUENT 0 September 1, 2008 16:12
Hypersonic flow Subramani FLUENT 8 May 7, 2007 21:02
Hypersonic Nonequilibrium Simulation David Shkval FLUENT 0 April 4, 2002 22:15
Hypersonic flow Patxi Gil Main CFD Forum 1 November 4, 1999 22:30


All times are GMT -4. The time now is 05:06.