| RodriguezFatz |
September 25, 2014 06:40 |
pimpleFoam - pisoFoam residuals
Hi all,
I just found something I can't explain.
If I run pimpleFoam in "piso - mode" with nOuterCorrectors = 1, it should basically give the same results / residuals as pisoFoam, right?
But it doesn't. Am I missing something?
PisoFoam - first iteration:
Code:
Courant Number mean: 0.10105476 max: 80.232093
DILUPBiCG: Solving for Ux, Initial residual = 5.1551169e-05, Final residual = 1.3012494e-06, No Iterations 1
DILUPBiCG: Solving for Uy, Initial residual = 0.00066370866, Final residual = 1.0486425e-05, No Iterations 1
DILUPBiCG: Solving for Uz, Initial residual = 0.00053294441, Final residual = 1.4905737e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.060534343, Final residual = 0.003730857, No Iterations 1
GAMG: Solving for p, Initial residual = 0.014627404, Final residual = 0.0013854456, No Iterations 1
time step continuity errors : sum local = 1.5600398e-07, global = 2.2897736e-11, cumulative = 2.2897736e-11
GAMG: Solving for p, Initial residual = 0.018441401, Final residual = 0.0015585163, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0052997847, Final residual = 0.00035413287, No Iterations 3
time step continuity errors : sum local = 3.9924023e-08, global = 9.8316871e-10, cumulative = 1.0060664e-09
DILUPBiCG: Solving for omega, Initial residual = 4.7423151e-09, Final residual = 4.7423151e-09, No Iterations 0
DILUPBiCG: Solving for k, Initial residual = 0.00021318114, Final residual = 2.2792783e-06, No Iterations 1
bounding k, min: -0.00030976635 max: 1538.8916 average: 203.71795
ExecutionTime = 16.9 s ClockTime = 17 s
PimpleFoam first iteration:
Code:
Courant Number mean: 0.10105476 max: 80.232093
Time = 0.0542865
DILUPBiCG: Solving for Ux, Initial residual = 9.1161119e-05, Final residual = 5.967053e-07, No Iterations 2
DILUPBiCG: Solving for Uy, Initial residual = 0.0014069531, Final residual = 8.6561107e-05, No Iterations 1
DILUPBiCG: Solving for Uz, Initial residual = 0.00098082802, Final residual = 7.8052633e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.1902419, Final residual = 0.011517931, No Iterations 1
GAMG: Solving for p, Initial residual = 0.037312436, Final residual = 0.0034209833, No Iterations 2
time step continuity errors : sum local = 4.3548365e-07, global = 4.0814203e-09, cumulative = 4.0814203e-09
GAMG: Solving for p, Initial residual = 0.047153128, Final residual = 0.0024610992, No Iterations 2
GAMG: Solving for p, Initial residual = 0.014242098, Final residual = 0.0011257833, No Iterations 3
time step continuity errors : sum local = 1.4064563e-07, global = -1.8442513e-08, cumulative = -1.4361093e-08
DILUPBiCG: Solving for omega, Initial residual = 5.848965e-09, Final residual = 5.848965e-09, No Iterations 0
DILUPBiCG: Solving for k, Initial residual = 0.00031688108, Final residual = 7.1107399e-06, No Iterations 1
bounding k, min: -0.002219953 max: 1538.8287 average: 204.14907
ExecutionTime = 17.9 s ClockTime = 18 s
fvSolution file:
Code:
/*--------------------------------*- C++ -*----------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.2.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
object fvSolution;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
solvers
{
p
{
solver GAMG;
tolerance 1e-6;
relTol 1.0e-1;
maxIter 100;
smoother DICGaussSeidel;
nPreSweeps 0;
nPostSweeps 1;
nFinestSweeps 2;
cacheAgglomeration true;
nCellsInCoarsestLevel 50;
agglomerator faceAreaPair;
mergeLevels 1;
};
pFinal
{
solver GAMG;
tolerance 1e-6;
relTol 1.0e-1;
maxIter 100;
smoother DICGaussSeidel;
nPreSweeps 0;
nPostSweeps 1;
nFinestSweeps 2;
cacheAgglomeration true;
nCellsInCoarsestLevel 50;
agglomerator faceAreaPair;
mergeLevels 1;
};
U
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
UFinal
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
k
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
kFinal
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
omega
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
omegaFinal
{
solver PBiCG;
preconditioner DILU;
tolerance 1e-08;
relTol 1.0e-1;
maxIter 100;
};
}
SIMPLE
{
nNonOrthogonalCorrectors 1;
residualControl
{
p 1e-5;
U 1e-5;
k 1e-5;
omega 1e-5;
}
}
PISO
{
nCorrectors 2;
nNonOrthogonalCorrectors 1;
}
PIMPLE
{
nOuterCorrectors 1;
nCorrectors 2;
nNonOrthogonalCorrectors 1;
// pRefCell 0;
// pRefValue 0;
turbOnFinalIterOnly false;
residualControl
{
p
{
relTol 1.0e-1;
tolerance 1.0e-3;
}
U
{
relTol 1.0e-1;
tolerance 1.0e-3;
}
k
{
relTol 1e-1;
tolerance 1.0e-3;
}
omega
{
relTol 1e-1;
tolerance 1.0e-3;
}
}
}
potentialFlow
{
nNonOrthogonalCorrectors 10;
}
/*
relaxationFactors
{
fields
{
"(p)" 0.3;
}
equations
{
"(U)" 0.7;
"(k)" 0.8;
"(omega)" 0.8;
}
}
*/
// ************************************************************************* //
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