Convergence and Under Relaxation Factors- Dependency?

sidharth9426 · October 13, 2015, 05:04

Dear all,
I am working on a project of under hood thermal management. My solutions were oscillating between a extreme minor difference, for some vales of URF. But when decreased the value of URF(Under Relaxation Factors) by small value, my solutions got changed, by a minor value.

So my question is, Should the converged solution independent of URF value or not? IF not then how to know that we have a correct solution.??

Thanking You,
Sidharth.

me3840 · October 19, 2015, 14:12

The solution should not change, however that says nothing about how long you must run the solver with a lower URF to match the solution of the solver at a higher URF

October 13, 2015, 05:04	Convergence and Under Relaxation Factors- Dependency?	#1
sidharth9426 New Member Sidharth Join Date: Sep 2015 Posts: 29 Rep Power: 10	Dear all, I am working on a project of under hood thermal management. My solutions were oscillating between a extreme minor difference, for some vales of URF. But when decreased the value of URF(Under Relaxation Factors) by small value, my solutions got changed, by a minor value. So my question is, Should the converged solution independent of URF value or not? IF not then how to know that we have a correct solution.?? Thanking You, Sidharth.

October 19, 2015, 14:12		#2
me3840 Senior Member Join Date: Nov 2010 Location: USA Posts: 1,232 Rep Power: 24	The solution should not change, however that says nothing about how long you must run the solver with a lower URF to match the solution of the solver at a higher URF sidharth9426 likes this.