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

which Solvers are efficient?

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

LinkBack Thread Tools Display Modes
Old   November 12, 2010, 09:00
Default which Solvers are efficient?
New Member
Iman Harimi
Join Date: Nov 2010
Location: Iran
Posts: 1
Rep Power: 0
ImanJoon is on a distinguished road
May explain that "TDMA algorithm" is efficient yet or not?
which new solvers are there for solving equations system?
ImanJoon is offline   Reply With Quote

Old   November 12, 2010, 13:16
New Member
Join Date: May 2009
Posts: 28
Rep Power: 10
walli is on a distinguished road
You should make your question more precise. Which algorithm is efficient often depends on the structure and properties of your system of equations. Why TDMA is efficient is more or less obvious... For tridiagonal matrices, the Gaussian elimination can be done in O(n) instead of O(n^3) due to the tridiagonal pattern. Unfortunately, tridiagonal matrices are not very common in real applications. Typically, only simple one-dimensional problems can be formulated as a tridiagonal system.
walli is offline   Reply With Quote

Old   November 13, 2010, 06:31
Senior Member
Join Date: Aug 2010
Location: Singapore
Posts: 109
Rep Power: 9
lava12005 is on a distinguished road
Well for the case of TDMA, it's actually just a backward substitution. So I think for the case of tridiagonal matrix TDMA is most efficient solver.
lava12005 is offline   Reply With Quote

Old   November 19, 2010, 07:37
Senior Member
ztdep's Avatar
p ding
Join Date: Mar 2009
Posts: 337
Rep Power: 11
ztdep is on a distinguished road
Send a message via Yahoo to ztdep Send a message via Skype™ to ztdep
TDMA can be used only when the matrix have five diagonals
if you obtaned the matrix on a unstructed grid system, krylov iteration method is strongly sugguested.
ztdep is offline   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
Direct vs Iterative Linear Solvers for non-linears bill Main CFD Forum 16 November 5, 2014 08:18
network comms amg solvers bob Main CFD Forum 0 March 1, 2007 20:58
PHOENICS Solvers Hu Phoenics 0 June 28, 2002 07:37
How efficient is optimal SOR compared with other solvers? Wolfgang Schmidt Main CFD Forum 1 March 13, 2000 10:09
Iterative equation solvers in CFD Vitaly Bulgakov Main CFD Forum 32 March 1, 1999 12:11

All times are GMT -4. The time now is 01:56.