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

ADI-SOR convergance

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

LinkBack Thread Tools Display Modes
Old   November 9, 2005, 20:13
Default ADI-SOR convergance
Posts: n/a

I have written an ADI-SOR code and I guess it works fine for 1 X 1 meter domain. But when I decrease the dimensions to for example 10 microns by 10 microns, the convergance time will be very very long. I am solving a 2d rectangular problem, with heat flux at one side, and newtonian BC (h is not zero) at all other sides (All Newmann; no drichlei BCs).

My question is, should lengths of the domain have any effect on convergance time?

I appreciate any help.

Thanks, Mohsen

  Reply With Quote

Old   November 12, 2005, 21:05
Default Re: ADI-SOR convergance
Posts: n/a
Convergence shouldn't be affected by lengths if the same dimensionless parameters are used. You might be getting into round off errors of computer because of too small numbers involved in calculation. If you normalize your equatinons, and solve the normalized equation, you may resolve the problem

  Reply With Quote

Old   November 14, 2005, 21:43
Default Re: ADI-SOR convergance
Posts: n/a
Thanks Wen. My equations are non-dimensional and I am using double-precision vaiables. So you think I am doing ADI in a wrong way?
  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
Use SOR or ADI for solving the time dependent reynolds equation Hermano Main CFD Forum 1 July 5, 2010 09:47
ADI implicit doesn't converge George Papadakis Main CFD Forum 2 July 8, 2009 13:27
algo for ADI or fractional step scheme handling crossderivative terms HaKu Main CFD Forum 8 April 4, 2009 02:10
Adi in 2D???sos xiegang Main CFD Forum 0 October 14, 2003 08:04
ADI of N-S equations Zhou Yongcheng Main CFD Forum 5 January 18, 2001 08:58

All times are GMT -4. The time now is 02:24.