|
[Sponsors] |
August 30, 2011, 04:20 |
cfx multigrid
|
#1 |
New Member
Join Date: Jan 2011
Posts: 22
Rep Power: 15 |
does anyone now what cfx uses to solve the linear system if you set "solver multigrid = f" (as in switch off multigrid)?
|
|
August 30, 2011, 07:09 |
|
#2 |
Super Moderator
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 17,665
Rep Power: 143 |
Good question, I am not sure. I assume it disables the grid coarsening stuff which leaves you just with the linear solver. Almost always this will result in much slower convergence, but on rare cases it may help.
|
|
August 30, 2011, 08:07 |
|
#3 |
New Member
Join Date: Jan 2011
Posts: 22
Rep Power: 15 |
i've yet to come across a case where this would help
i think you're right, it probably just uses the coarsest-grid-level solver, but i wonder what that would be. can't really be a direct solver, otherwise it would slow down to crawl ... |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Pros and Cons for CFX, CFdesign, COMSOL | Val | Main CFD Forum | 3 | June 10, 2011 03:20 |
Does CFX always use Algebraic Multigrid ? | Gui | CFX | 1 | August 8, 2007 19:35 |
PhD using CFX | Rui | CFX | 9 | May 28, 2007 06:59 |
CFX 4.4 installation problem | Pandu Sattvika | CFX | 1 | December 1, 2001 05:07 |
Multigrid applied to k-e models | Paulo Zandonade | Main CFD Forum | 9 | May 24, 1999 09:10 |