CFD Online Logo CFD Online URL
Home > Forums > Main CFD Forum

Under relaxation with PISO ?

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

LinkBack Thread Tools Display Modes
Old   October 7, 2009, 13:01
Lightbulb Under relaxation with PISO ?
Join Date: Sep 2009
Posts: 45
Rep Power: 9
AirS is on a distinguished road
hi all,

I've had a look on the PISO and SIMPLE algorithm and, as far as I understand the SIMPLE algorithm expects under-relaxation factors while PISO doesn't.
So here are my questions:
Do I have to set under-relaxation factors in SIMPLE each time I use it ? or can I omit them without risking divergence ?
Moreover, can I use them with PISO even though it doesn't expect any ?

Thank you for lightening my mind!
AirS is offline   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
Relaxation and convergence sammi Phoenics 0 March 20, 2008 04:32
PISO vs. SIMPLE benedikt flurl Main CFD Forum 2 April 14, 2005 06:54
relaxation parameter rvndr Main CFD Forum 0 May 5, 2004 12:34
Question on adjusting relaxation factor CFD Rookie Main CFD Forum 3 January 26, 2004 15:37
Relaxation factor Moon CD-adapco 1 June 13, 2003 11:13

All times are GMT -4. The time now is 13:02.