"Residuals" in residualControl
Posted December 4, 2016 at 18:54 by kindle
PimpleFoam hahhahhhahha
Quote:
Originally Posted by knuckles
In system/fvSolution, I can specify tolerances on matrix solvers:
My understanding is that openfoam will construct an equation of the form Ax = b, solve it in some iterative way, and will stop iterating when the residual, |Ax - b|, is less than 1e-08 (relTol = 0 so it is not a factor here).
With SIMPLE/PIMPLE, it's also possible to specify a residualControl:
The code above means that the "outer" PIMPLE loops will continue until either
I assume that the residuals being considered here quantify, in some way, how well the pressure/momentum coupling is being resolved. Does anyone know which residuals are considered here?
Code:
solvers
{
p
{
solver PGC;
preconditioner DIC;
tolerance 1e-08;
relTol 0;
}
}
With SIMPLE/PIMPLE, it's also possible to specify a residualControl:
Code:
PIMPLE
{
nOuterCorrectors 50;
nCorrectors 3;
nNonOrthogonalCorrectors 3;
residualControl
{
U
{
tolerance 1e-3;
relTol 0;
}
p
{
tolerance 1e-2;
relTol 0;
}
}
}
- 50 (nOuterCorrectors) loops have been completed
- The residuals of both U and p fall below the specified values
I assume that the residuals being considered here quantify, in some way, how well the pressure/momentum coupling is being resolved. Does anyone know which residuals are considered here?
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