[Magistrane]

Dear foamers,


I have a problem when I try to switch my case from OpenFoam 2.3 to OF6.0 in the fvSolutiondict :
My first code was :

PIMPLE
{
    momentumPredictor        yes;
    correctPhi               yes;
    nOuterCorrectors         1000;
    nCorrectors              1;
    nNonOrthogonalCorrectors 1;
    pRefCell                 0;
    pRefValue                0;
    moveMeshOuterCorrectors  yes;
    consistent               yes;
    
    residualControl
    {
        "(U|p)"
        {
            relTol          0;
            tolerance       1e-6;
        }
    } 
}

It worked on OF 2.3 exactly as expected : pimple's iterations until reaching residuals convergence.


On 6.0, with this code, I receive an error message :

--> FOAM FATAL ERROR: 
Solution convergence criteria specified in PIMPLE.residualControl must be given as single values. Corrector loop convergence criteria, if appropriate, are specified as dictionaries in PIMPLE.<loopName>ResidualControl.

A read a forum saying that I have to change my code to :

PIMPLE
{
    momentumPredictor        yes;
    correctPhi               yes;
    nOuterCorrectors         1000;
    nCorrectors              1;
    nNonOrthogonalCorrectors 1;
    pRefCell                 0;
    pRefValue                0;
    moveMeshOuterCorrectors  yes;
    consistent               yes;
    
residualControl
{
    U   1e-06;
    p   1e-06;
}

This is absolutly not working : pimple finish the 1000 iterations before going to the next time step not matter if the residuals are under 1e-06 or not.



Do you have any explanation for me ? Any alternative syntaxe ?

Thanks,
Best regards.

[Magistrane]

Up,
residualControl variable name changed.
Remplaced by :

outerCorrectorResidualControl
{
"(U|k|epsilon)" { relTol 0; tolerance 0.0001; } }

[Gerry Kan]

Folks:

Here is a (rhetorical) question ... if the old "residualControl" is now reassigned to "outerCorrectorResidualControl", what does the new "residualControl" monitor?

Thanks, Gerry.

[sjohn2]

Same question here the outerCorrectorResidualControl does not do anything?

[sqek]

Originally Posted by sjohn2

Same question here the outerCorrectorResidualControl does not do anything?

The absolute and relative tolerances both have to be met, so setting relTol to 0 means it will never count as converged
If you only want the absolute tolerance to be checked set relTol to 1
(So opposite to the solvers section of fvSchemes, where any convergence criteria being met will make it stop, as far as I'm aware)