openfoam-15-fvsolution

name	openfoam-15-fvsolution
description	Sub-skill of openfoam: 1.5 fvSolution (+3).
version	1.0.0
category	engineering
type	reference
scripts_exempt	true

1.5 fvSolution (+3)

1.5 fvSolution

SIMPLE (steady-state):

solvers
{
    p
    {
        solver          GAMG;
        tolerance       1e-06;
        relTol          0.1;
        smoother        GaussSeidel;
    }
    "(U|k|epsilon|omega|f|v2)"
    {
        solver          smoothSolver;
        smoother        symGaussSeidel;
        tolerance       1e-05;
        relTol          0.1;
    }
}
SIMPLE
{
    nNonOrthogonalCorrectors 0;
    consistent      yes;
    residualControl
    {
        p               1e-2;
        U               1e-3;
        "(k|epsilon|omega)" 1e-3;
    }
}
relaxationFactors
{
    equations
    {
        U               0.9;
        ".*"            0.9;
    }
}

PIMPLE (transient):

solvers
{
    p     { solver GAMG; tolerance 1e-7; relTol 0.01; smoother DICGaussSeidel; }
    pFinal { $p; relTol 0; }
    "(U|k|epsilon)" { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-05; relTol 0.1; }
    "(U|k|epsilon)Final" { $U; relTol 0; }
}
PIMPLE
{
    nNonOrthogonalCorrectors 0;
    nCorrectors         2;
}

PISO (laminar transient):

solvers
{
    p     { solver PCG; preconditioner DIC; tolerance 1e-06; relTol 0.05; }
    pFinal { $p; relTol 0; }
    U     { solver smoothSolver; smoother symGaussSeidel; tolerance 1e-05; relTol 0; }
}
PISO
{
    nCorrectors     2;
    nNonOrthogonalCorrectors 0;
    pRefCell        0;
    pRefValue       0;
}

Available linear solvers: GAMG, PCG, PBiCGStab, smoothSolver. Available smoothers: GaussSeidel, symGaussSeidel, DIC, DILU, DICGaussSeidel.

1.6 transportProperties and turbulenceProperties

Single-phase incompressible:

// constant/transportProperties
transportModel  Newtonian;
nu              1e-05;          // kinematic viscosity [m^2/s]

Turbulence model selection:

// constant/turbulenceProperties
simulationType      RAS;        // or laminar, LES
RAS
{
    RASModel        kEpsilon;   // kOmegaSST, realizableKE, SpalartAllmaras
    turbulence      on;
    printCoeffs     on;
}

Required 0/ fields by turbulence model:

Model	Fields needed in 0/
laminar	U, p
kEpsilon	U, p, k, epsilon, nut
kOmegaSST	U, p, k, omega, nut
SpalartAllmaras	U, p, nuTilda, nut
interFoam (add)	alpha.water, p_rgh

1.7 Boundary Conditions

Velocity (U) — dimensions [0 1 -1 0 0 0 0]:

Patch	BC type	Value
Inlet (fixed)	fixedValue	uniform (10 0 0)
Outlet	zeroGradient	—
Wall (no-slip)	noSlip	—
2D front/back	empty	—
Symmetry	symmetry	—

Pressure (p) — dimensions [0 2 -2 0 0 0 0] (kinematic):

Patch	BC type	Value
Inlet	zeroGradient	—
Outlet (fixed)	fixedValue	uniform 0
Wall	zeroGradient	—
2D front/back	empty	—

Turbulence fields — wall functions:

Field	Wall BC	Inlet BC	Outlet BC
k	kqRWallFunction	fixedValue	zeroGradient
epsilon	epsilonWallFunction	fixedValue	zeroGradient
omega	omegaWallFunction	fixedValue	zeroGradient
nut	nutkWallFunction	calculated	calculated

1.8 Dimension Vectors Reference

Format: [kg m s K mol A cd]

Field	Dimensions
U (velocity)	[0 1 -1 0 0 0 0]
p (kinematic)	[0 2 -2 0 0 0 0]
k	[0 2 -2 0 0 0 0]
epsilon	[0 2 -3 0 0 0 0]
omega	[0 0 -1 0 0 0 0]
nut, nu	[0 2 -1 0 0 0 0]
alpha.water	[0 0 0 0 0 0 0]