Convergence problem with tetrahedral grids -- CFD Online Discussion Forums

December 2, 2010, 17:58	Convergence problem with tetrahedral grids	#1
Tarak Senior Member Tarak Join Date: Aug 2010 Location: State College, PA Posts: 111 Rep Power: 15	Hii, I am running the case of flow over a square cylinder using LES by ICEM generated grid. But only after a few time steps, the code diverges, with Courant number crossing 4 or 5. I tried to use Upwind Schemes as well as first order time stepping to tackle the problem, but still the issue wasn't solved. At last, I increased the number of PISO non-orthogonal correctors to 5 (since increasing to 3 didn't help), and now its converging, but its painstakingly slow. Can you please let me know of a way by which I can run OF with tethrahedral grids smoothly. Thanks, Tarak

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
convergence problem	commonyue	Main CFD Forum	1	December 1, 2009 03:54
Submerged fin, Convergence problem	supermouniette	FLUENT	10	July 6, 2009 10:47
Convergence of CFX field in FSI analysis	nasdak	CFX	2	June 29, 2009 01:17
convergence problem in comsol	anderson	COMSOL	0	February 24, 2008 16:54
CONVERGENCE PROBLEM - oil boiler	MM	FLUENT	1	February 15, 2007 05:24

All times are GMT -4. The time now is 06:01.