Algebraic Multigrid

Batis · August 25, 2010, 11:49

Hi,

Does anyone know where I can find more detailed information about Algebraic Multigrid acceleration used in CFX solver?

The main things I would like to know:
1. What kind of coarsening-refinement cycle is used; V-,W-,F, FMG, other?
2. What is so called Additive Corection?

Thanks,
Batis

ghorrocks · August 25, 2010, 17:50

Have you read the documentation and chased up the references from the theory section? This describes the linear solver.

Batis · August 25, 2010, 19:03

I've study the documentation very precisely but there is nothing about which coarsening-refinement cycle is used in CFX. I also don't think that I can find this information in references.

As for Additive Corrections, I have found some satisfactory informations.

Regards,
Batis

stumpy · August 26, 2010, 16:03

I'm fairly sure it's the W cycle, but I can't recall where I heard that.

Batis · August 26, 2010, 19:52

Thaks for reply.

Greets,
Batis

August 25, 2010, 11:49	Algebraic Multigrid	#1
Batis New Member Przemek Join Date: Feb 2010 Location: Warsaw Poland Posts: 27 Rep Power: 16	Hi, Does anyone know where I can find more detailed information about Algebraic Multigrid acceleration used in CFX solver? The main things I would like to know: 1. What kind of coarsening-refinement cycle is used; V-,W-,F, FMG, other? 2. What is so called Additive Corection? Thanks, Batis Last edited by Batis; August 25, 2010 at 12:23.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Grid Block Interface / Algebraic Multigrid	Harun	CFX	0	August 5, 2007 16:06
Black Box Algebraic Multigrid	Neazen	Main CFD Forum	0	June 4, 2007 07:10
Seeking Algebraic Multigrid Code	Anna	Main CFD Forum	1	May 11, 2006 20:05
Algebraic Multigrid	Michael	Main CFD Forum	2	December 29, 2005 02:23
Algebraic Multigrid for nonuniform grid	Joshua Lee	Main CFD Forum	4	March 16, 2000 13:05

August 25, 2010, 17:50		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	Have you read the documentation and chased up the references from the theory section? This describes the linear solver.

August 25, 2010, 19:03		#3
Batis New Member Przemek Join Date: Feb 2010 Location: Warsaw Poland Posts: 27 Rep Power: 16	I've study the documentation very precisely but there is nothing about which coarsening-refinement cycle is used in CFX. I also don't think that I can find this information in references. As for Additive Corrections, I have found some satisfactory informations. Regards, Batis

August 26, 2010, 16:03		#4
stumpy Senior Member Join Date: Apr 2009 Posts: 531 Rep Power: 21	I'm fairly sure it's the W cycle, but I can't recall where I heard that.

August 26, 2010, 19:52		#5
Batis New Member Przemek Join Date: Feb 2010 Location: Warsaw Poland Posts: 27 Rep Power: 16	Thaks for reply. Greets, Batis