CFD Online Logo CFD Online URL
Home > Forums > CFX

no convergence at high pressure

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

LinkBack Thread Tools Display Modes
Old   October 22, 2007, 04:33
Default no convergence at high pressure
Posts: n/a

I cannot reach the convergence criteria (1E-04) at 60 bar (SST, 2.2 million nodes, v=62 m/s, mesh quality nice). If I choose the pressure 1 bar, then I have a nice convergence after 100 steps. Please have somebody any idea how I can solve the problem? Thank you very much. Toralf
  Reply With Quote

Old   October 22, 2007, 06:59
Default Re: no convergence at high pressure
Glenn Horrocks
Posts: n/a

Does the higher pressure induce higher flow velocities? Is it compressible flow so therefore it chokes? Higher flow velocities or significant compressibility effects often will slow convergence.

Glenn Horrocks
  Reply With Quote

Old   October 22, 2007, 07:02
Default Re: no convergence at high pressure
Posts: n/a
Check reference pressure that you are setting. For, good convergence, it should be near to the pressure at which CFD domain is at.
  Reply With Quote


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
Convergence Centurion2011 FLUENT 44 June 20, 2017 09:57
"Pressure Inlet" Boundary Setup Wijaya FLUENT 15 May 18, 2016 10:08
Simulating a high pressure flow through a valve Kromagnsss FLUENT 8 July 2, 2010 05:20
interFoam: strange pressure with high fluid viscosity? ckroener OpenFOAM 3 April 7, 2010 12:51
Gas pressure question Dan Moskal Main CFD Forum 0 October 24, 2002 22:02

All times are GMT -4. The time now is 23:19.