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

Preconditioning for Pressure Correction Equation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   February 23, 2006, 14:01
Default Preconditioning for Pressure Correction Equation
  #1
cfd101
Guest
 
Posts: n/a
I'm having problems converging the Pressure-Correction equation using SIMPLE in parallel for incompressible flows I am using the AMG solver and the same case converges in serial. Somewhere, I read that introducing a compressibility factor (beta) might help in convergence but couldnot find any literature. Could anyone help me as to how to calculate the factor based on current values of pressure rather than simply assuming 0.01 - 0.05 of Ap as mentioned in Peric.
  Reply With Quote

Old   February 23, 2006, 15:34
Default Re: Preconditioning for Pressure Correction Equati
  #2
ag
Guest
 
Posts: n/a
If your code converges in serial mode but not in parallel mode then I don't think your problem is going to be solved by changing your under-relaxation. It sounds like you have some communication issues. Have you validated your parallelization against any other simple problems?
  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
Calculation of the Governing Equations Mihail CFX 7 September 7, 2014 06:27
The correction on pressure equation of SIMPLE algorithm in MRFSimpleFOAM solver renyun0511 OpenFOAM Running, Solving & CFD 0 November 10, 2010 02:47
Strcture of pressure correction equation in PISO stable over time ? sebi Main CFD Forum 1 October 26, 2010 22:19
Pressure Correction Equation Hooman Main CFD Forum 1 June 22, 2010 11:54
BCs for Pressure Correction Equation (SIMPLE) Bharath Somayaji Main CFD Forum 1 March 1, 2006 07:12


All times are GMT -4. The time now is 21:48.