Multigrid vs. conjugate gradient -- CFD Online Discussion Forums

November 3, 2017, 07:30	Multigrid vs. conjugate gradient	#1
Tscar Member Join Date: Nov 2014 Posts: 36 Rep Power: 12	Hi, I have strange experience with conjugate gradient solver. Typically in dynamic mesh cases for pcorr (but also for p in steady mesh cases), GAMG achieves convergence relatively quickly while PCG (and similiar solvers) diverge. Do you have similar experience? Do you have an idea what causes this behavior? Thank you Tomas

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 Off Pingbacks are On Refbacks are On Forum Rules

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
question regarding LES of pipe flow - pimpleFoam	Dan1788	OpenFOAM Running, Solving & CFD	37	December 26, 2017 15:42
Periodic flow using Cyclic - comparison with Fluent	nusivares	OpenFOAM Running, Solving & CFD	30	December 12, 2017 06:35
Conjugate Gradient Solver.	Froed	Main CFD Forum	0	July 29, 2005 07:29
conjugate gradient method	parth	Main CFD Forum	1	March 11, 2005 14:08
Preconditioned Conjugate Gradient Solver!	Chidu	Main CFD Forum	1	January 21, 2004 12:43

All times are GMT -4. The time now is 11:52.