|April 16, 2013, 05:43||
Join Date: Jul 2012
Posts: 134Rep Power: 6
In my transient analysis i am applying solar heat flux to the wall which varies from 0 to 24 [hr],heat flux is maximum at 12 PM.while solving solution goes smoothly up to 6 AM after that i am getting error floating point exception i think this is probably due to sudden variation in input heat flux at 6 AM my question is
i want to apply under-relaxation factor at this stage how to do this in CFX
Thank you sir
|April 16, 2013, 10:37||
Join Date: Jun 2012
Posts: 314Rep Power: 7
Floating point exception usually occurs when the solver wants to divide by zero.
Try double precision.
|April 16, 2013, 19:29||
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 13,183Rep Power: 102
Fiddling with under relaxation factors is almost certainly NOT the solution. Forget about SIMPLE based solvers where you were constantly fiddling with them, CFX is very different to that.
But this question is an FAQ: http://www.cfd-online.com/Wiki/Ansys...do_about_it.3F
|under relaxation factors|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Under relaxation factor for external coupling||dhxlxz||CFX||10||August 11, 2015 20:52|
|relaxation factor for PISO algorithm||sasanghomi||OpenFOAM Running, Solving & CFD||1||February 2, 2013 06:51|
|under relaxation factor and the steady state||jing113cn||FLUENT||0||November 2, 2009 13:13|
|Question on adjusting relaxation factor||CFD Rookie||Main CFD Forum||3||January 26, 2004 15:37|
|Relaxation factor||Moon||CD-adapco||1||June 13, 2003 11:13|