|June 16, 2009, 18:18||
Join Date: Mar 2009
Posts: 18Rep Power: 8
When do you know that a system of coupled equation will generate a stable solution??
I've noticed that the source term plays a huge part during the solution of the differential equation. If it is too large, then there is a good chance that the system will be difficult to solve (or the solution will diverge).
My problem is too define how large can it be??
For example, if i am calculating temperatures, the source term can be in the order of thousands, whereas with concentration, the source term is usually a fraction.
I know that if I split the source term into Sc and Sp (like Patankar suggests) that is a good way to improve the stability. But in some cases, this is not enough.
Could anyone share some of his/hers experiences with this issue?
|Thread||Thread Starter||Forum||Replies||Last Post|
|grid dependancy||gueynard a.||Main CFD Forum||19||June 27, 2014 21:22|
|Struggling to reach a stable solution||andrewburns||OpenFOAM Running, Solving & CFD||8||January 22, 2008 04:23|
|IcoFoam parallel woes||msrinath80||OpenFOAM Running, Solving & CFD||9||July 22, 2007 02:58|
|Could anybody help me see this error and give help||liugx212||OpenFOAM Running, Solving & CFD||3||January 4, 2006 19:07|
|Wall functions||Abhijit Tilak||Main CFD Forum||6||February 5, 1999 02:16|