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

methods for Poisson equation

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

Reply
 
LinkBack Thread Tools Display Modes
Old   December 14, 2007, 02:14
Default methods for Poisson equation
  #1
qunwuhe@hotmail.com
Guest
 
Posts: n/a
Who can tell me the available method to solve Poisson equation? I used SOR for its simplicity, but reviewer said it is not stat of the art. I also heard SOR is stable than FFT(Fast Fourier Transform).

Any one has the experience?

thx
  Reply With Quote

Old   December 16, 2007, 07:56
Default Re: methods for Poisson equation
  #2
phil
Guest
 
Posts: n/a
Hello qunwuhe,

There is two groups of method to resolv Poisson equation :

1 iterative method, like SOR

2 direct, which can use FFT to resolv more efficently and quicly Poisson equation

These two way have some advantages and inconvenients.

To be more precise, direct method is more accurate than than iterative method by more expansive in term of memory (RAM). Second point, when u use FFT you can't use lot of Boundary method. Finally, I think that direct method is recommanded when you -can- use it, but if you want to have a very generalized solver, iterative is the right way.

regards,
  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
Constant velocity of the material Sas CFX 15 July 13, 2010 08:56
mass flow in is not equal to mass flow out saii CFX 2 September 18, 2009 08:07
Fast iterative methods (for Laplace equation)? pzhang Main CFD Forum 2 September 30, 2008 16:28
continuity equation Rafal Main CFD Forum 4 November 29, 2006 10:27


All times are GMT -4. The time now is 20:13.