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

SIMPLE algorithm confusion

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 6, 2010, 05:36
Default SIMPLE algorithm confusion
  #1
Senior Member
 
Join Date: Apr 2009
Posts: 118
Rep Power: 8
lost.identity is on a distinguished road
Hello,

I'm wondering if SIMPLE algorithm is an implicit algorithm. I know that SIMPLE stands for semi-implicit method for pressure linked equations. In Patankar's book he describes that it's Implicit because the pressure correction effects on the neighboring velocities are omitted, so it becomes partially implicit.

However, my question is if it is partially implicit, then does it mean it's partially explicit. And if it's partially explicit does it mean that when you run the simulations you need to be careful of the time step size, like you are for fully explicit schemes?

Thanks.
lost.identity is offline   Reply With Quote

Old   October 7, 2010, 11:48
Default
  #2
New Member
 
Join Date: Oct 2010
Posts: 10
Rep Power: 6
njenkins360 is on a distinguished road
I would assume if it's partially implicit, then the method has explicit behaviors, in which, yes, you would need to calculate a CFL condition, as the method is not unconditionally stable.
njenkins360 is offline   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
SIMPLE algorithm in 3D cylindrical coordinates zouchu Main CFD Forum 1 January 20, 2014 18:02
What is advantage of SIMPLE algorithm? Geon-Hong Main CFD Forum 1 May 18, 2010 07:46
About Phase Coupled SIMPLE (PC-SIMPLE) algorithm Yan Kai Main CFD Forum 0 April 18, 2007 03:48
About Phase Coupled SIMPLE (PC-SIMPLE) algorithm Yan Kai FLUENT 0 April 13, 2007 23:17
SIMPLE algorithm Jonathan Castro Main CFD Forum 3 December 10, 1999 05:59


All times are GMT -4. The time now is 03:29.