Converge Simple

humber11 · October 4, 2021, 19:55

I was doing an example that I found on the internet, square tube, and I noticed that my simulation did not converge with the precision that converged in the example. (the example used the same parameters as simpleFoam/pitzDaily)

I noticed the error was in fvSolution. And the bad precision of the convergence was because of the Simple algorithm, which had not put the: "consistent yes" and the residualControl. But my doubt is to know why this? why do i have to put the consistent and the residualControl so that it converges right?

humber11 · October 6, 2021, 07:27

I found the solution. In general it was a pretty dumb question.

When using consistent I was enabling the SIMPLEC method and it has a convergence gain between 20% to 30% compared to normal SIMPLE, so the convergence in my solution was faster.

October 4, 2021, 19:55	Converge Simple	#1
humber11 New Member Humberto Join Date: Mar 2021 Location: Brasil Posts: 23 Rep Power: 5	I was doing an example that I found on the internet, square tube, and I noticed that my simulation did not converge with the precision that converged in the example. (the example used the same parameters as simpleFoam/pitzDaily) I noticed the error was in fvSolution. And the bad precision of the convergence was because of the Simple algorithm, which had not put the: "consistent yes" and the residualControl. But my doubt is to know why this? why do i have to put the consistent and the residualControl so that it converges right?

October 6, 2021, 07:27		#2
humber11 New Member Humberto Join Date: Mar 2021 Location: Brasil Posts: 23 Rep Power: 5	I found the solution. In general it was a pretty dumb question. When using consistent I was enabling the SIMPLEC method and it has a convergence gain between 20% to 30% compared to normal SIMPLE, so the convergence in my solution was faster. Giorgio Crasto likes this.

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