CFD Online URL
[Sponsors]
Home > Forums > Main CFD Forum

ADI in 3D

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 23, 1999, 11:54
Default ADI in 3D
  #1
cherif
Guest
 
Posts: n/a
Dear friends, I am trying to solve a transient 3dD conduction problem in cylindrical coordinates. To solve the set of algebraic equations obtained i tried to use the ADI method. Unfortunately till now the results are bad. Can someone help me with reference (i have books about this topic but in 2D which is quite different), any article close to my topic will be very helpfull for me.

Thank you very much for your help
  Reply With Quote

Old   September 23, 1999, 12:04
Default Re: ADI in 3D
  #2
Hongjun Li
Guest
 
Posts: n/a
ADI in 3-D is NOT an unconditional stable scheme, although its 2-D version is. There was a revised version of 3-D ADI but I just can remember where to find it. You may try another solver.

HLI
  Reply With Quote

Old   September 23, 1999, 13:25
Default Re: ADI in 3D
  #3
Jim Park
Guest
 
Posts: n/a
There are a couple of ancient references that gave usable algorithms when I used them last (1971!). Take a look at:

J. Douglas, "Alternating Direction Methods for Three Space Variables," Numerische Mathematik, v. 4, pp. 41-63 (1962).

I actually used the following:

P. L. T. Brian, "A Finite-Difference Method of High-Order Accuracy for the Solution of Three-Dimensional Transient Heat Conduction Problems," AIChE Journal, v. 7, pp. 367-370 (1961).

Good Luck!

Jim
  Reply With Quote

Old   September 23, 1999, 18:50
Default Re: ADI in 3D
  #4
clifford bradford
Guest
 
Posts: n/a
yes ADI should work well for this problem if you remember that it is not unconditionally stable. also it isn't easy to program. i found this out when i tried a 2D problem in rectangular coordinates using this method. personally i recommend Alternating Directions explicit (ADE) scheme (see Tannehill, Anderson, and Pletcher's CFD book) it is easy to code and is unconditionally stable (at least in 2D)
  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
Use SOR or ADI for solving the time dependent reynolds equation Hermano Main CFD Forum 1 July 5, 2010 10:47
ADI implicit doesn't converge George Papadakis Main CFD Forum 2 July 8, 2009 14:27
algo for ADI or fractional step scheme handling crossderivative terms HaKu Main CFD Forum 8 April 4, 2009 03:10
Adi in 2D???sos xiegang Main CFD Forum 0 October 14, 2003 09:04
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 08:57.