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ENH: Adding functionality to scalarTransport FO and residence time tutorials for VOF

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and single phase cases. Registration of the compressed flux in interFoam as it is
needed for the FO if used.
This commit is contained in:
sergio
2016-11-21 09:21:45 -08:00
parent dfbb9d0900
commit 143e99194f
16 changed files with 601 additions and 40 deletions
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210
src/functionObjects/solvers/scalarTransport/scalarTransport.C
View File

@ -29,6 +29,7 @@ License
#include "fvmDiv.H"
#include "fvmLaplacian.H"
#include "fvmSup.H"
#include "CMULES.H"
#include "turbulentTransportModel.H"
#include "turbulentFluidThermoModel.H"
#include "addToRunTimeSelectionTable.H"
@ -85,7 +86,8 @@ Foam::volScalarField& Foam::functionObjects::scalarTransport::transportedField()
Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
(
const volScalarField& s,
const surfaceScalarField& phi
const surfaceScalarField& phi,
const volScalarField& alpha
) const
{
typedef incompressible::turbulenceModel icoModel;
@ -93,9 +95,11 @@ Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
word Dname("D" + s.name());
volScalarField phaseMask(pos(alpha - 0.99));
if (constantD_)
{
return tmp<volScalarField>
tmp<volScalarField> tD
(
new volScalarField
(
@ -111,6 +115,18 @@ Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
dimensionedScalar(Dname, phi.dimensions()/dimLength, D_)
)
);
return phaseMask*tD;
}
else if (nutName_ != "none")
{
const volScalarField& nutMean =
mesh_.lookupObject<volScalarField>(nutName_);
return tmp<volScalarField>
(
new volScalarField(Dname, phaseMask*nutMean)
);
}
else if (foundObject<icoModel>(turbulenceModel::propertiesName))
{
@ -119,7 +135,10 @@ Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
turbulenceModel::propertiesName
);
return model.nuEff();
return tmp<volScalarField>
(
new volScalarField(Dname, phaseMask*model.nuEff())
);
}
else if (foundObject<cmpModel>(turbulenceModel::propertiesName))
{
@ -128,7 +147,10 @@ Foam::tmp<Foam::volScalarField> Foam::functionObjects::scalarTransport::D
turbulenceModel::propertiesName
);
return model.muEff();
return tmp<volScalarField>
(
new volScalarField(Dname, phaseMask*model.muEff())
);
}
else
{
@ -163,14 +185,22 @@ Foam::functionObjects::scalarTransport::scalarTransport
:
fvMeshFunctionObject(name, runTime, dict),
fieldName_(dict.lookupOrDefault<word>("field", "s")),
phiName_("phi"),
rhoName_("rho"),
phiName_(dict.lookupOrDefault<word>("phi", "phi")),
UPhiName_(dict.lookupOrDefault<word>("UPhi", "none")),
rhoName_(dict.lookupOrDefault<word>("rho", "rho")),
nutName_(dict.lookupOrDefault<word>("nut", "none")),
phaseName_(dict.lookupOrDefault<word>("phase", "none")),
phasePhiCompressedName_
(
dict.lookupOrDefault<word>("phasePhiCompressed", "alphaPhiUn")
),
D_(0),
constantD_(false),
nCorr_(0),
resetOnStartUp_(false),
schemesField_("unknown-schemesField"),
fvOptions_(mesh_)
fvOptions_(mesh_),
bounded01_(dict.lookupOrDefault<bool>("bounded01", true))
{
read(dict);
@ -199,6 +229,11 @@ bool Foam::functionObjects::scalarTransport::read(const dictionary& dict)
dict.readIfPresent("phi", phiName_);
dict.readIfPresent("rho", rhoName_);
dict.readIfPresent("UPhi", UPhiName_);
dict.readIfPresent("nut", nutName_);
dict.readIfPresent("phase", phaseName_);
dict.readIfPresent("bounded01", bounded01_);
schemesField_ = dict.lookupOrDefault("schemesField", fieldName_);
constantD_ = false;
@ -223,12 +258,93 @@ bool Foam::functionObjects::scalarTransport::execute()
{
Log << type() << " write:" << endl;
const surfaceScalarField& phi = lookupObject<surfaceScalarField>(phiName_);
tmp<surfaceScalarField> tPhi
(
new surfaceScalarField
(
IOobject
(
"phi",
mesh_.time().timeName(),
mesh_.time(),
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh_,
dimensionedScalar("tPhi", dimMass/dimTime, 0.0)
)
);
surfaceScalarField& phi = tPhi.ref();
const dimensionSet dim
(
mesh_.lookupObject<surfaceScalarField>(phiName_).dimensions()
);
bool compressible = true;
if (dim == dimVolume/dimTime)
{
compressible = false;
phi.dimensions().reset(dimVolume/dimTime);
}
//Obtain phi from phiName or constructed from UPhiName
if (phiName_ != "none")
{
phi = const_cast<surfaceScalarField&>
(
mesh_.lookupObject<surfaceScalarField>(phiName_)
);
}
else if(UPhiName_ != "none")
{
const volVectorField& Uphi =
mesh_.lookupObject<volVectorField>(UPhiName_);
if (!compressible)
{
phi = fvc::interpolate(Uphi) & mesh_.Sf();
}
else
{
const volScalarField& rho =
mesh_.lookupObject<volScalarField>(rhoName_);
phi = fvc::interpolate(rho*Uphi) & mesh_.Sf();
}
}
tmp<volScalarField> tPhaseMask
(
new volScalarField
(
IOobject
(
"tPhaseMask",
mesh_.time().timeName(),
mesh_.time(),
IOobject::NO_READ,
IOobject::NO_WRITE
),
mesh_,
dimensionedScalar("tPhaseMask", dimless, 1.0)
)
);
volScalarField& phaseMask = tPhaseMask.ref();
// Set phaseMask if s is transported in a phase
if (phaseName_ != "none")
{
const volScalarField& alpha =
mesh_.lookupObject<volScalarField>(phaseName_);
phaseMask = alpha;
}
volScalarField& s = transportedField();
// Calculate the diffusivity
volScalarField D(this->D(s, phi));
volScalarField D(this->D(s, phi, phaseMask));
word divScheme("div(phi," + schemesField_ + ")");
word laplacianScheme("laplacian(" + D.name() + "," + schemesField_ + ")");
@ -240,12 +356,84 @@ bool Foam::functionObjects::scalarTransport::execute()
relaxCoeff = mesh_.equationRelaxationFactor(schemesField_);
}
if (phi.dimensions() == dimMass/dimTime)
// two phase scalar transport
if (phaseName_ != "none")
{
const volScalarField& alpha =
mesh_.lookupObject<volScalarField>(phaseName_);
const surfaceScalarField& limitedPhiAlpa =
mesh_.lookupObject<surfaceScalarField>(phasePhiCompressedName_);
/*
surfaceScalarField phic(2.0*mag(phi/mesh_.magSf()));
const volVectorField gradAlpha(fvc::grad(alpha, "nHat"));
surfaceVectorField gradAlphaf(fvc::interpolate(gradAlpha));
dimensionedScalar deltaN
(
"deltaN", 1e-8/pow(average(mesh_.V()), 1.0/3.0)
);
surfaceVectorField nHatfv(gradAlphaf/(mag(gradAlphaf) + deltaN));
surfaceScalarField nHat(nHatfv & mesh_.Sf());
surfaceScalarField phir(phic*nHat);
surfaceScalarField limitedPhiAlpa
(
fvc::flux
(
phi,
alpha,
"div(phi,s)"
)
+ fvc::flux
(
-fvc::flux(-phir, (1-alpha), "div(phirb,s)"),
alpha,
"div(phirb,s)"
)
);
*/
// Reset D dimensions consistent with limitedPhiAlpa
D.dimensions().reset(limitedPhiAlpa.dimensions()/dimLength);
tmp<surfaceScalarField> tTPhiUD;
// Solve
for (label i = 0; i <= nCorr_; i++)
{
fvScalarMatrix sEqn
(
fvm::ddt(s)
+ fvm::div(limitedPhiAlpa, s, divScheme)
- fvm::laplacian(D, s, laplacianScheme)
==
alpha*fvOptions_(s)
);
sEqn.relax(relaxCoeff);
fvOptions_.constrain(sEqn);
sEqn.solve(mesh_.solverDict(schemesField_));
tTPhiUD = sEqn.flux();
}
if (bounded01_)
{
MULES::explicitSolve(s, phi, tTPhiUD.ref(), 1, 0);
}
}
else if (compressible)
{
const volScalarField& rho = lookupObject<volScalarField>(rhoName_);
for (label i = 0; i <= nCorr_; i++)
{
fvScalarMatrix sEqn
(
fvm::ddt(rho, s)
@ -262,7 +450,7 @@ bool Foam::functionObjects::scalarTransport::execute()
sEqn.solve(mesh_.solverDict(schemesField_));
}
}
else if (phi.dimensions() == dimVolume/dimTime)
else if (!compressible)
{
for (label i = 0; i <= nCorr_; i++)
{

86
src/functionObjects/solvers/scalarTransport/scalarTransport.H
View File

@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2012-2016 OpenFOAM Foundation
\\/ M anipulation | Copyright (C) 2015-2016 OpenCFD Ltd.
\\/ M anipulation | Copyright (C) 2016 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -33,8 +33,12 @@ Description
- To specify the field name set the 'field' entry
- To employ the same numerical schemes as another field set
the 'schemesField' entry,
- The diffusivity can be set manually using the 'D' entry, or retrieved
from the turbulence model (if applicable).
- The diffusivity can be set manually using the 'D' entry, retrieved
from the turbulence model or specified nut
- To specify a different flux derived from U enter UPhi velocity field name
(the phi used will be calculated based on this UPhi)
- To specify a transport quantity within a phase enter phase.
- bounded01 bounds the transported scalar within 0 and 1.
Usage
Example of function object specification to solve a scalar transport
@ -47,6 +51,11 @@ Usage
type scalarTransport;
libs ("libutilityFunctionObjects.so");
resetOnStartUp no;
region cabin;
field H2O;
fvOptions
{
...
@ -55,17 +64,67 @@ Usage
}
\endverbatim
Example of function object specification to solve a residency time
in a two phase flow:
equation:
\verbatim
functions
{
sTransport
{
type scalarTransport;
libs ("libsolverFunctionObjects.so");
enabled true;
writeControl outputTime;
writeInterval 1;
field s;
bounded01 false;
phase alpha.water;
write true;
fvOptions
{
unitySource
{
type scalarSemiImplicitSource;
enabled true;
scalarSemiImplicitSourceCoeffs
{
selectionMode all;
volumeMode specific;
injectionRateSuSp
{
s (1 0);
}
}
}
}
resetOnStartUp false;
}
}
\endverbatim
Where the entries comprise:
\table
Property | Description | Required | Default value
type | Type name: scalarTransport | yes |
phi | Name of flux field | no | phi
rho | Name of density field | no | rho
D | Diffision coefficient | no | auto generated
UPhi | Name of U to generate phi | no | none
phase | Name of the phase name | no | none
nut | Name of the turbulence viscocity | no | none
D | Diffusion coefficient | no | auto generated
nCorr | Number of correctors | no | 0
resetOnStartUp | Reset scalar to zero on start-up | no | no
schemesField | Name of field to specify schemes | no | fieldName
fvOptions | List of scalar sources | no |
bounded01 | Bounds scalar betwee 0-1 for multiphase | no |true
phasePhiCompressed |Compressed flux for VOF | no | alphaPhiUn
\endtable
See also
@ -106,9 +165,22 @@ class scalarTransport
//- Name of flux field (optional)
word phiName_;
//- Name of velocity field from which the flux is obtained if phiName is
// not given (optional)
word UPhiName_;
//- Name of density field (optional)
word rhoName_;
//- Name of turbulent viscosity field (optional)
word nutName_;
//- Name of phase field
word phaseName_;
//- Name of phase field compressed flux
word phasePhiCompressedName_;
//- Diffusion coefficient (optional)
scalar D_;
@ -127,6 +199,9 @@ class scalarTransport
//- Run-time selectable finite volume options, e.g. sources, constraints
fv::optionList fvOptions_;
//- Bound scalar between 0-1 using MULES for multiphase case
bool bounded01_;
// Private Member Functions
@ -137,7 +212,8 @@ class scalarTransport
tmp<volScalarField> D
(
const volScalarField& s,
const surfaceScalarField& phi
const surfaceScalarField& phi,
const volScalarField& alpha
) const;
//- Disallow default bitwise copy construct