Linear Iterative Solver + Elliptic PDE -- CFD Online Discussion Forums

November 14, 2005, 19:59	Linear Iterative Solver + Elliptic PDE	#1
cfd101 Guest Posts: n/a	When solving numerically for an elliptic PDE (Heat Conduction ) which has huge source terms, should the accuracy of iterative solver be affected by the magnitude of source terms in comparison to the discretized coefficient ap? Even though central differencing schemes insures diagonal dominance, I see the numerical errors increasing with increase in source terms for same levels of convergence. I'm using AMG + GMRES for solving this problem.

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
Need help with boundary conditions: open to atmosphere	Wolle	OpenFOAM	2	April 11, 2011 08:32
Which AMG Linear Solver	Zuixy	STAR-CCM+	4	March 20, 2011 11:24
Linear System solver in Newton method	proto84	Main CFD Forum	3	November 30, 2009 11:06
Navier-stokes equations and iterative solver??	wuliang	Main CFD Forum	2	January 13, 2003 23:28
solver for linear system with large sparse matrix	Yangang Bao	Main CFD Forum	1	October 25, 1999 05:22

All times are GMT -4. The time now is 21:28.