What can I do if the residual increases

August 18, 2007, 09:37

Hi I am tried to simulate steady state, two phase flow I used the VOF model I have a problem when the iteration start the residual of continuity increses untill it became 1+e4 (10000) and it still fixed at this value and the results not converage anymore what should i do to solve this problem?

Thanks for any help trb

August 19, 2007, 17:04

Try with these:

1. decrease the flow rate or 2. decrease Under-Relaxation Factors and 3. Begin with the "First Order" with Coupled P-V Coupling till only QUICK Discretization.

August 18, 2007, 09:37	What can I do if the residual increases	#1
trb Guest Posts: n/a	Hi I am tried to simulate steady state, two phase flow I used the VOF model I have a problem when the iteration start the residual of continuity increses untill it became 1+e4 (10000) and it still fixed at this value and the results not converage anymore what should i do to solve this problem? Thanks for any help trb

August 19, 2007, 17:04	Re: What can I do if the residual increases	#2
Farshid Owrang Guest Posts: n/a	Try with these: 1. decrease the flow rate or 2. decrease Under-Relaxation Factors and 3. Begin with the "First Order" with Coupled P-V Coupling till only QUICK Discretization.

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