solver convergence

September 12, 2007, 06:29

I am running a problem related valve with tetrahedral elements. Inlet boundary is velocity and pressure boundary is 0 pa while reference pressure is 101235 pa. With default values, the star solver oscillates pressure equation residuals. The default value of relaxation paratmeter is 3 and tried with 2.5 or 3.5 but no improvements. Can any star-cd user suggest a hint to overcome this convergence problem.

bskr

September 12, 2007, 09:04

you mean default value by pressure 0.3. Suggest to increase the number of sweeps to 5000.

September 12, 2007, 06:29	solver convergence	#1
Dr C.Bhasker Guest Posts: n/a	I am running a problem related valve with tetrahedral elements. Inlet boundary is velocity and pressure boundary is 0 pa while reference pressure is 101235 pa. With default values, the star solver oscillates pressure equation residuals. The default value of relaxation paratmeter is 3 and tried with 2.5 or 3.5 but no improvements. Can any star-cd user suggest a hint to overcome this convergence problem. bskr

September 12, 2007, 09:04	Re: solver convergence	#2
norbinou Guest Posts: n/a	you mean default value by pressure 0.3. Suggest to increase the number of sweeps to 5000.

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