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

Multigrid stability problem

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

LinkBack Thread Tools Display Modes
Old   June 26, 2008, 22:04
Default Multigrid stability problem
Posts: n/a
Hi all; I am solving a 3D Poisson Equation by linear multigrid method. It works fine when dx=dy=dz. But when the sizes of dx, dy or dz are not equal, I get instability problems. The Poisson solver convergce slowly ,or sometimes direvges. I have the same problem in 2D and also with FAS-Multigrid. Is it an usual case in Multigrid? I will be very pleased is somebody help me to fix this problem. Thanks in advance.

  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
Stability problem due to turbulent dispersion force in a subcooled boiling model Edy OpenFOAM 7 August 10, 2011 12:00
Can I solve this problem by Fluent? Kai_kc FLUENT 1 October 27, 2010 05:29
multigrid sureshkumar Main CFD Forum 0 June 9, 2006 01:20
Multigrid method Suresh kumar Main CFD Forum 1 April 24, 2006 20:07
Multigrid problem Davoche Main CFD Forum 1 December 9, 2005 05:19

All times are GMT -4. The time now is 06:51.