IcoFoam stationary solution STRONGLY dependent on the tolerance of the linear solver

Mehrez · February 14, 2015, 19:49

Hi,
I would like to ask you if someone has tried to investigate the dependence of the flow regime (steady or unsteady) that is found by icoFoam Solver for a given problem on the tolerance set for the linear solver ?

In fact, as I reduce the solver tolerance, I notice that the Reynolds number corresponding to the onset of unsteady flow decreases.

Can you figure out how can this affect the accuracy of the results.

Thank you,

Mehrez

Mehrez · February 16, 2015, 06:59

Comments ?

February 14, 2015, 19:49	IcoFoam stationary solution STRONGLY dependent on the tolerance of the linear solver	#1
Mehrez Member Sami Join Date: Nov 2012 Location: Cap Town, South Africa Posts: 87 Rep Power: 13	Hi, I would like to ask you if someone has tried to investigate the dependence of the flow regime (steady or unsteady) that is found by icoFoam Solver for a given problem on the tolerance set for the linear solver ? In fact, as I reduce the solver tolerance, I notice that the Reynolds number corresponding to the onset of unsteady flow decreases. Can you figure out how can this affect the accuracy of the results. Thank you, Mehrez

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February 16, 2015, 06:59		#2
Mehrez Member Sami Join Date: Nov 2012 Location: Cap Town, South Africa Posts: 87 Rep Power: 13	Comments ?