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

implementing preconditioning

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

Reply
 
LinkBack Thread Tools Display Modes
Old   October 19, 2000, 16:03
Default implementing preconditioning
  #1
clifford bradford
Guest
 
Posts: n/a
Hello, I'm interested in implementing preconditioning to a time iterative code that I'm have. the code is 4 step R-K scheme with the choice of 1st order Riemann, Kinetic, or limited or unlimited 2nd order upwind schemes (MUSCL). I've been reading papers on preconditioning and I've noticed that for the most part the authors write the preconditioned Euler equations in primitive variable (non conservative) form. I had been of the impression that to implement preconditioning for steady state solutions one simply multiplied the residual by the preconditioning matrix at each time step, but after reading these papers I'm not sure how to proceed. Does anyone out there have succesful experience in writing preconditioned codes and can give me advice. particularly is the preconditioning applied at each R-K step, is it applied to artificial dissipation terms, how do you deal with it at the boundaries, what are the special treatment for the N-S equations (including turbulence), and what are the most efficient ways of coding (I'm working with f77 for the moment but f90 or C tips would be relevant too). Also If anyone has good online references to preconditioning links I'd appreciate it.
  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
Roe implement about preconditioning ricklee Main CFD Forum 7 July 7, 2006 06:14
Re: Preconditioning for moving grids ganesh Main CFD Forum 0 April 6, 2006 06:18
Preconditioning in 3D ganesh Main CFD Forum 0 February 28, 2006 07:39
local preconditioning Manish Jaiman Main CFD Forum 3 May 1, 2000 08:31
About Residual Distribution Schemes and Local Preconditioning for Unstationary NS Eqns. D.A. Caraeni Main CFD Forum 8 August 7, 1998 12:04


All times are GMT -4. The time now is 18:48.