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reactingEulerFoam: Improved Sauter mean diameter calculation

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The Sauter mean diameter calculation has been modified to be more stable
in the limit of vanishing phase fraction. The calculation of the overall
Sauter mean diameter for a populationBalance involving more than one
velocityGroup has been removed. This calculation depends upon the phase
fraction and it is not stable as the fractions tend to zero. The overall
Sauter mean diameter is only used for post-processing and can still be
recovered from the individual diameter fields of the involved
velocityGroups.

Some parts of the population balance modeling have also been renamed and
refactored.

Patch contributed by Institute of Fluid Dynamics, Helmholtz-Zentrum
Dresden - Rossendorf (HZDR)
This commit is contained in:
Will Bainbridge
2018-04-23 09:02:14 +01:00
parent af88b75e2c
commit ee6216b4e7
11 changed files with 134 additions and 396 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/Make/files
View File

@ -30,7 +30,7 @@ populationBalanceModel/breakupModels/exponential/exponential.C
populationBalanceModel/breakupModels/powerLaw/powerLaw.C
populationBalanceModel/daughterSizeDistributionModels/daughterSizeDistributionModel/daughterSizeDistributionModel.C
populationBalanceModel/daughterSizeDistributionModels/uniformBinaryDsd/uniformBinaryDsd.C
populationBalanceModel/daughterSizeDistributionModels/uniformBinary/uniformBinary.C
populationBalanceModel/driftModels/driftModel/driftModel.C
populationBalanceModel/driftModels/constantDrift/constantDrift.C

137
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/diameterModels/velocityGroup/velocityGroup.C
View File

@ -49,74 +49,33 @@ namespace diameterModels
// * * * * * * * * * * * * Private Member Functions * * * * * * * * * * * * //
Foam::tmp<Foam::volScalarField>
Foam::diameterModels::velocityGroup::secondMoment() const
{
tmp<volScalarField> tm2
(
new volScalarField
(
IOobject
(
"m2",
phase_.time().timeName(),
phase_.mesh()
),
phase_.mesh(),
dimensionedScalar("m2", inv(dimLength), Zero)
)
);
volScalarField& m2 = tm2.ref();
forAll(sizeGroups_, i)
{
const sizeGroup& fi = sizeGroups_[i];
m2 += sqr(fi.d())*formFactor()*fi
*max(fi.phase(), small)/fi.x();
}
return tm2;
}
Foam::tmp<Foam::volScalarField>
Foam::diameterModels::velocityGroup::thirdMoment() const
{
tmp<volScalarField> tm3
(
new volScalarField
(
IOobject
(
"m3",
phase_.time().timeName(),
phase_.mesh()
),
phase_.mesh(),
dimensionedScalar("m3", dimless, Zero)
)
);
volScalarField& m3 = tm3.ref();
forAll(sizeGroups_, i)
{
const sizeGroup& fi = sizeGroups_[i];
m3 += pow3(fi.d())*formFactor()*fi
*max(fi.phase(), small)/fi.x();
}
return tm3;
}
Foam::tmp<Foam::volScalarField> Foam::diameterModels::velocityGroup::dsm() const
{
return
max(min(phase_/m2_, sizeGroups_.last().d()), sizeGroups_.first().d());
tmp<volScalarField> tInvDsm
(
new volScalarField
(
IOobject
(
"invDsm",
phase_.time().timeName(),
phase_.mesh()
),
phase_.mesh(),
dimensionedScalar("invDsm", inv(dimLength), Zero)
)
);
volScalarField& invDsm = tInvDsm.ref();
forAll(sizeGroups_, i)
{
const sizeGroup& fi = sizeGroups_[i];
invDsm += fi/fi.d();
}
return 1.0/tInvDsm;
}
@ -243,44 +202,6 @@ Foam::diameterModels::velocityGroup::velocityGroup
),
fSum()
),
m2_
(
IOobject
(
IOobject::groupName
(
"m2",
IOobject::groupName
(
phase.name(),
popBalName_
)
),
phase.time().timeName(),
phase.mesh()
),
phase.mesh(),
dimensionedScalar("m2", inv(dimLength), Zero)
),
m3_
(
IOobject
(
IOobject::groupName
(
"m3",
IOobject::groupName
(
phase.name(),
popBalName_
)
),
phase.time().timeName(),
phase.mesh()
),
phase.mesh(),
dimensionedScalar("m3", dimless, Zero)
),
d_
(
IOobject
@ -354,10 +275,6 @@ Foam::diameterModels::velocityGroup::velocityGroup
fields_.add(sizeGroups_[i]);
}
m2_ = secondMoment();
m3_ = thirdMoment();
d_ = dsm();
}
@ -379,10 +296,6 @@ void Foam::diameterModels::velocityGroup::preSolve()
void Foam::diameterModels::velocityGroup::postSolve()
{
m2_ = secondMoment();
m3_ = thirdMoment();
d_ = dsm();
Info<< this->phase().name() << " Sauter mean diameter, min, max = "

16
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/diameterModels/velocityGroup/velocityGroup.H
View File

@ -112,12 +112,6 @@ class velocityGroup
//- Sum of sizeGroup volume fractions
volScalarField fSum_;
//- Second moment of the distribution
volScalarField m2_;
//- Third moment of the distribution
volScalarField m3_;
//- Number-based Sauter-mean diameter of the phase
volScalarField d_;
@ -133,10 +127,6 @@ class velocityGroup
// Private member functions
tmp<volScalarField> secondMoment() const;
tmp<volScalarField> thirdMoment() const;
tmp<volScalarField> dsm() const;
tmp<volScalarField> fSum() const;
@ -180,12 +170,6 @@ public:
//- Return sizeGroups belonging to this velocityGroup
inline const PtrList<sizeGroup>& sizeGroups() const;
//- Return second moment of the distribution
inline const volScalarField& m2() const;
//- Return third moment of the distribution
inline const volScalarField& m3() const;
//- Return const-reference to multivariate convectionScheme
inline const tmp<fv::convectionScheme<scalar>>& mvConvection() const;

16
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/diameterModels/velocityGroup/velocityGroupI.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2017-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -53,20 +53,6 @@ Foam::diameterModels::velocityGroup::sizeGroups() const
}
inline const Foam::volScalarField&
Foam::diameterModels::velocityGroup::m2() const
{
return m2_;
}
inline const Foam::volScalarField&
Foam::diameterModels::velocityGroup::m3() const
{
return m3_;
}
inline const Foam::tmp<Foam::fv::convectionScheme<Foam::scalar>>&
Foam::diameterModels::velocityGroup::mvConvection() const
{

4
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/coalescenceModels/CoulaloglouTavlaridesCoalescence/CoulaloglouTavlaridesCoalescence.H
View File

@ -45,8 +45,8 @@ Description
\vartable
\sigma | Surface tension [N/m]
v_i | Volume of bubble i [m3]
v_j | Volume of bubble j [m3]
v_i | Volume of droplet i [m3]
v_j | Volume of droplet j [m3]
\epsilon_c | Turbulent dissipation rate of continuous phase [m2/s3]
\alpha_d | Total void fraction of disperse phase [-]
\mu_c | Molecular dynamic viscosity of liquid phase [Pa s]

4
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/daughterSizeDistributionModel/daughterSizeDistributionModel.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2017-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -114,7 +114,7 @@ void Foam::diameterModels::daughterSizeDistributionModel::correct()
for (label i = 0; i <= k; i++)
{
nik_[k].append(new dimensionedScalar (this->n(i, k)));
nik_[k].append(new dimensionedScalar (this->calcNik(i, k)));
}
}
}

8
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/daughterSizeDistributionModel/daughterSizeDistributionModel.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2017-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -118,7 +118,11 @@ public:
//- Calculate and return total number of particles assigned to class i
// when a particle of class k breaks
virtual dimensionedScalar n(const label i, const label k) const = 0;
virtual dimensionedScalar calcNik
(
const label i,
const label k
) const = 0;
};

76
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/uniformBinaryDsd/uniformBinaryDsd.C → applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/uniformBinary/uniformBinary.C
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2017-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -23,7 +23,7 @@ License
\*---------------------------------------------------------------------------*/
#include "uniformBinaryDsd.H"
#include "uniformBinary.H"
#include "addToRunTimeSelectionTable.H"
#include "breakupModel.H"
@ -35,11 +35,11 @@ namespace diameterModels
{
namespace daughterSizeDistributionModels
{
defineTypeNameAndDebug(uniformBinaryDsd, 0);
defineTypeNameAndDebug(uniformBinary, 0);
addToRunTimeSelectionTable
(
daughterSizeDistributionModel,
uniformBinaryDsd,
uniformBinary,
dictionary
);
}
@ -49,8 +49,8 @@ namespace daughterSizeDistributionModels
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::diameterModels::daughterSizeDistributionModels::uniformBinaryDsd::
uniformBinaryDsd
Foam::diameterModels::daughterSizeDistributionModels::uniformBinary::
uniformBinary
(
const breakupModel& breakup,
const dictionary& dict
@ -62,81 +62,35 @@ uniformBinaryDsd
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::diameterModels::daughterSizeDistributionModels::uniformBinaryDsd::
~uniformBinaryDsd()
Foam::diameterModels::daughterSizeDistributionModels::uniformBinary::
~uniformBinary()
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
Foam::dimensionedScalar
Foam::diameterModels::daughterSizeDistributionModels::uniformBinaryDsd::n
Foam::diameterModels::daughterSizeDistributionModels::uniformBinary::calcNik
(
const label i,
const label k
) const
{
const sizeGroup& fi = *breakup_.popBal().sizeGroups()[i];
const sizeGroup& fk = *breakup_.popBal().sizeGroups()[k];
const dimensionedScalar& xi = fi.x();
const dimensionedScalar& xk = fk.x();
dimensionedScalar x("x", dimVolume, Zero);
dimensionedScalar xii("xii", dimVolume, Zero);
const dimensionedScalar& xi = breakup_.popBal().sizeGroups()[i]->x();
const dimensionedScalar& xk = breakup_.popBal().sizeGroups()[k]->x();
const List<sizeGroup*>& sizeGroups = breakup_.popBal().sizeGroups();
if (i == 0)
{
x = xi;
}
else
{
x = breakup_.popBal().sizeGroups()[i-1]->x();
}
if (i == breakup_.popBal().sizeGroups().size() - 1)
{
xii = fi.x();
}
else
{
xii = breakup_.popBal().sizeGroups()[i+1]->x();
}
if (i == 0)
{
return
1.0/(xii - xi)
*(
(xii*xii - 0.5*sqr(xii))
- (xi*xii - 0.5*sqr(xi))
)
*2.0/xk;
return (sizeGroups[i+1]->x() - xi)/xk;
}
else if (i == k)
{
return
1.0/(xi - x)
*(
(0.5*sqr(xi) - xi*x)
- (0.5*sqr(x) - x*x)
)
*2.0/xk;
return (xi - sizeGroups[i-1]->x())/xk;
}
else
{
return
1.0/(xii - xi)
*(
(xii*xii - 0.5*sqr(xii))
- (xi*xii - 0.5*sqr(xi))
)
*2.0/xk
+ 1.0/(xi - x)
*(
(0.5*sqr(xi) - xi*x)
- (0.5*sqr(x) - x*x)
)
*2.0/xk;
return (sizeGroups[i+1]->x() - xi)/xk + (xi - sizeGroups[i-1]->x())/xk;
}
}

20
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/uniformBinaryDsd/uniformBinaryDsd.H → applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/daughterSizeDistributionModels/uniformBinary/uniformBinary.H
View File

@ -2,7 +2,7 @@
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2017 OpenFOAM Foundation
\\ / A nd | Copyright (C) 2017-2018 OpenFOAM Foundation
\\/ M anipulation |
-------------------------------------------------------------------------------
License
@ -22,7 +22,7 @@ License
along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
Class
Foam::diameterModels::daughterSizeDistributionModels::uniformBinaryDsd
Foam::diameterModels::daughterSizeDistributionModels::uniformBinary
Description
Uniform binary daughter size distribution. Used for verification and
@ -30,12 +30,12 @@ Description
populationBalanceModel class.
SourceFiles
uniformBinaryDsd.C
uniformBinary.C
\*---------------------------------------------------------------------------*/
#ifndef uniformBinaryDsd_H
#define uniformBinaryDsd_H
#ifndef uniformBinary_H
#define uniformBinary_H
#include "daughterSizeDistributionModel.H"
@ -49,10 +49,10 @@ namespace daughterSizeDistributionModels
{
/*---------------------------------------------------------------------------*\
Class uniformBinaryDsd Declaration
Class uniformBinary Declaration
\*---------------------------------------------------------------------------*/
class uniformBinaryDsd
class uniformBinary
:
public daughterSizeDistributionModel
{
@ -64,7 +64,7 @@ public:
// Constructor
uniformBinaryDsd
uniformBinary
(
const breakupModel& breakup,
const dictionary& dict
@ -72,14 +72,14 @@ public:
//- Destructor
virtual ~uniformBinaryDsd();
virtual ~uniformBinary();
// Member Functions
//- Return total number of particles assigned to class i when a particle
// of class k breaks
virtual dimensionedScalar n(const label i, const label k) const;
virtual dimensionedScalar calcNik(const label i, const label k) const;
};

238
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/populationBalanceModel/populationBalanceModel.C
View File

@ -143,9 +143,9 @@ void Foam::diameterModels::populationBalanceModel::add(sizeGroup* group)
(
"Su",
fluid_.time().timeName(),
fluid_.mesh()
mesh_
),
fluid_.mesh(),
mesh_,
dimensionedScalar
(
"Su",
@ -163,9 +163,9 @@ void Foam::diameterModels::populationBalanceModel::add(sizeGroup* group)
(
"SuSp",
fluid_.time().timeName(),
fluid_.mesh()
mesh_
),
fluid_.mesh(),
mesh_,
dimensionedScalar
(
"SuSp",
@ -217,7 +217,7 @@ void Foam::diameterModels::populationBalanceModel::createPhasePairs()
}
void Foam::diameterModels::populationBalanceModel::preSolve()
void Foam::diameterModels::populationBalanceModel::correct()
{
calcDeltas();
@ -264,8 +264,6 @@ birthByCoalescence
{
const sizeGroup& fj = *sizeGroups_[j];
const sizeGroup& fk = *sizeGroups_[k];
const volScalarField& alphaj = fj.phase();
const volScalarField& alphak = fk.phase();
dimensionedScalar Gamma;
dimensionedScalar v = fj.x() + fk.x();
@ -282,21 +280,23 @@ birthByCoalescence
// Avoid double counting of events
if (j == k)
{
Sui_ = 0.5*fi.x()*coalescenceRate_()*fj*alphaj/fj.x()*fk*alphak
/fk.x()*Gamma;
Sui_ =
0.5*fi.x()*coalescenceRate_()*Gamma
*fj*fj.phase()/fj.x()
*fk*fk.phase()/fk.x();
}
else
{
Sui_ = fi.x()*coalescenceRate_()*fj*alphaj/fj.x()*fk*alphak/fk.x()
*Gamma;
Sui_ =
fi.x()*coalescenceRate_()*Gamma
*fj*fj.phase()/fj.x()
*fk*fk.phase()/fk.x();
}
Su_[i] += Sui_;
dimensionedScalar ratio = fj.x()/fi.x();
const volScalarField& rho = fi.phase().rho();
const phasePairKey pairij
(
fi.phase().name(),
@ -310,7 +310,7 @@ birthByCoalescence
Pair<word>::compare(pDmdt_.find(pairij).key(), pairij)
);
pDmdt_[pairij]->ref() += dmdtSign*ratio*Sui_*rho;
pDmdt_[pairij]->ref() += dmdtSign*ratio*Sui_*fi.phase().rho();
}
const phasePairKey pairik
@ -326,7 +326,7 @@ birthByCoalescence
Pair<word>::compare(pDmdt_.find(pairik).key(), pairik)
);
pDmdt_[pairik]->ref() += dmdtSign*(1 - ratio)*Sui_*rho;
pDmdt_[pairik]->ref() += dmdtSign*(1 - ratio)*Sui_*fi.phase().rho();
}
}
}
@ -341,20 +341,12 @@ deathByCoalescence
{
const sizeGroup& fi = *sizeGroups_[i];
const sizeGroup& fj = *sizeGroups_[j];
const volScalarField& alphai = fi.phase();
const volScalarField& alphaj = fj.phase();
SuSp_[i] +=
coalescenceRate_()
*alphai
*fj*alphaj/fj.x();
SuSp_[i] += coalescenceRate_()*fi.phase()*fj*fj.phase()/fj.x();
if (i != j)
{
SuSp_[j] +=
coalescenceRate_()
*alphaj
*fi*alphai/fi.x();
SuSp_[j] += coalescenceRate_()*fj.phase()*fi*fi.phase()/fi.x();
}
}
@ -372,13 +364,12 @@ birthByBreakup
{
const sizeGroup& fi = *sizeGroups_[i];
Sui_ = fi.x()*breakupRate_()*breakup_[model].dsdPtr()().nik(i, k)*fk
*fk.phase()/fk.x();
Sui_ =
fi.x()*breakupRate_()*breakup_[model].dsdPtr()().nik(i, k)
*fk*fk.phase()/fk.x();
Su_[i] += Sui_;
const volScalarField& rho = fi.phase().rho();
const phasePairKey pair
(
fi.phase().name(),
@ -392,7 +383,7 @@ birthByBreakup
Pair<word>::compare(pDmdt_.find(pair).key(), pair)
);
pDmdt_[pair]->ref() += dmdtSign*Sui_*rho;
pDmdt_[pair]->ref() += dmdtSign*Sui_*fi.phase().rho();
}
}
}
@ -452,10 +443,8 @@ birthByBinaryBreakup
{
const sizeGroup& fj = *sizeGroups_[j];
const sizeGroup& fi = *sizeGroups_[i];
const volScalarField& alphaj = fj.phase();
const volScalarField& rho = fj.phase().rho();
Sui_ = fi.x()*binaryBreakupRate_()*delta_[i][j]*fj*alphaj/fj.x();
Sui_ = fi.x()*binaryBreakupRate_()*delta_[i][j]*fj*fj.phase()/fj.x();
Su_[i] += Sui_;
@ -472,7 +461,7 @@ birthByBinaryBreakup
Pair<word>::compare(pDmdt_.find(pairij).key(), pairij)
);
pDmdt_[pairij]->ref() += dmdtSign*Sui_*rho;
pDmdt_[pairij]->ref() += dmdtSign*Sui_*fi.phase().rho();
}
dimensionedScalar Gamma;
@ -489,8 +478,9 @@ birthByBinaryBreakup
volScalarField& Suk = Sui_;
Suk = sizeGroups_[k]->x()*binaryBreakupRate_()*delta_[i][j]*fj*alphaj
/fj.x()*Gamma;
Suk =
sizeGroups_[k]->x()*binaryBreakupRate_()*delta_[i][j]*Gamma
*fj*fj.phase()/fj.x();
Su_[k] += Suk;
@ -511,7 +501,7 @@ birthByBinaryBreakup
)
);
pDmdt_[pairkj]->ref() += dmdtSign*Suk*rho;
pDmdt_[pairkj]->ref() += dmdtSign*Suk*fi.phase().rho();
}
}
}
@ -533,7 +523,6 @@ deathByBinaryBreakup
void Foam::diameterModels::populationBalanceModel::drift(const label i)
{
const sizeGroup& fi = *sizeGroups_[i];
const volScalarField& rho = fi.phase().rho();
if (i == 0)
{
@ -545,11 +534,13 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
}
else
{
rx_() = pos(driftRate_())*sizeGroups_[i+1]->x()/sizeGroups_[i]->x()
rx_() =
pos(driftRate_())*sizeGroups_[i+1]->x()/sizeGroups_[i]->x()
+ neg(driftRate_())*sizeGroups_[i-1]->x()/sizeGroups_[i]->x();
}
SuSp_[i] += (neg(1 - rx_()) + neg(1 - rx_()/(1 - rx_())))*driftRate_()
SuSp_[i] +=
(neg(1 - rx_()) + neg(1 - rx_()/(1 - rx_())))*driftRate_()
*fi.phase()/((rx_() - 1)*sizeGroups_[i]->x());
rx_() *= 0.0;
@ -559,26 +550,29 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
{
rx_() += pos(driftRate_())*sizeGroups_[i+2]->x()/sizeGroups_[i+1]->x();
rdx_() += pos(driftRate_())
rdx_() +=
pos(driftRate_())
*(sizeGroups_[i+2]->x() - sizeGroups_[i+1]->x())
/(sizeGroups_[i+1]->x() - sizeGroups_[i]->x());
}
else if (i == sizeGroups_.size() - 2)
{
rx_() += pos(driftRate_())*sizeGroups_[i+1]->x()
/sizeGroups_[i]->x();
rx_() += pos(driftRate_())*sizeGroups_[i+1]->x()/sizeGroups_[i]->x();
rdx_() += pos(driftRate_())
rdx_() +=
pos(driftRate_())
*(sizeGroups_[i+1]->x() - sizeGroups_[i]->x())
/(sizeGroups_[i]->x() - sizeGroups_[i-1]->x());
}
if (i == 1)
{
rx_() += neg(driftRate_())*sizeGroups_[i-1]->x()
rx_() +=
neg(driftRate_())*sizeGroups_[i-1]->x()
/sizeGroups_[i]->x();
rdx_() += neg(driftRate_())
rdx_() +=
neg(driftRate_())
*(sizeGroups_[i]->x() - sizeGroups_[i-1]->x())
/(sizeGroups_[i+1]->x() - sizeGroups_[i]->x());
}
@ -586,7 +580,8 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
{
rx_() += neg(driftRate_())*sizeGroups_[i-2]->x()/sizeGroups_[i-1]->x();
rdx_() += neg(driftRate_())
rdx_() +=
neg(driftRate_())
*(sizeGroups_[i-1]->x() - sizeGroups_[i-2]->x())
/(sizeGroups_[i]->x() - sizeGroups_[i-1]->x());
}
@ -596,7 +591,9 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
const sizeGroup& fj = *sizeGroups_[i+1];
volScalarField& Suj = Sui_;
Suj = pos(driftRate_())*driftRate_()*rdx_()*fi*fi.phase()/fi.x()
Suj =
pos(driftRate_())*driftRate_()*rdx_()
*fi*fi.phase()/fi.x()
/(rx_() - 1);
Su_[i+1] += Suj;
@ -614,7 +611,7 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
Pair<word>::compare(pDmdt_.find(pairij).key(), pairij)
);
pDmdt_[pairij]->ref() -= dmdtSign*Suj*rho;
pDmdt_[pairij]->ref() -= dmdtSign*Suj*fi.phase().rho();
}
}
@ -623,7 +620,9 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
const sizeGroup& fh = *sizeGroups_[i-1];
volScalarField& Suh = Sui_;
Suh = neg(driftRate_())*driftRate_()*rdx_()*fi*fi.phase()/fi.x()
Suh =
neg(driftRate_())*driftRate_()*rdx_()
*fi*fi.phase()/fi.x()
/(rx_() - 1);
Su_[i-1] += Suh;
@ -641,7 +640,7 @@ void Foam::diameterModels::populationBalanceModel::drift(const label i)
Pair<word>::compare(pDmdt_.find(pairih).key(), pairih)
);
pDmdt_[pairih]->ref() -= dmdtSign*Suh*rho;
pDmdt_[pairih]->ref() -= dmdtSign*Suh*fi.phase().rho();
}
}
}
@ -796,9 +795,9 @@ void Foam::diameterModels::populationBalanceModel::calcAlphas()
{
alphas_ *= 0.0;
forAllIter(PtrListDictionary<velocityGroup>, velocityGroups_, iter)
forAll(velocityGroups_, v)
{
alphas_ += iter().phase();
alphas_ += velocityGroups_[v]->phase();
}
}
@ -807,80 +806,15 @@ void Foam::diameterModels::populationBalanceModel::calcVelocity()
{
U_ *= 0.0;
forAllIter(PtrListDictionary<velocityGroup>, velocityGroups_, iter)
forAll(velocityGroups_, v)
{
U_ += iter().phase().U()
*max(iter().phase(), iter().phase().residualAlpha())
/max(alphas_, iter().phase().residualAlpha());
const phaseModel& phase = velocityGroups_[v]->phase();
U_ += phase*phase.U()/max(alphas_, phase.residualAlpha());
}
}
Foam::tmp<Foam::volScalarField>
Foam::diameterModels::populationBalanceModel::dsm() const
{
tmp<volScalarField> tDsm
(
new volScalarField
(
IOobject
(
"dsm",
fluid_.time().timeName(),
fluid_.mesh()
),
fluid_.mesh(),
dimensionedScalar("dsm", dimLength, Zero)
)
);
volScalarField& dsm = tDsm.ref();
volScalarField m2
(
IOobject
(
"m2",
fluid_.time().timeName(),
fluid_.mesh()
),
fluid_.mesh(),
dimensionedScalar("m2", inv(dimLength), Zero)
);
volScalarField m3
(
IOobject
(
"m3",
fluid_.time().timeName(),
fluid_.mesh()
),
fluid_.mesh(),
dimensionedScalar("m3", dimless, Zero)
);
forAll(velocityGroups_, i)
{
const velocityGroup& velGroup = *velocityGroups_[i];
m2 += velGroup.m2();
m3 += velGroup.m3();
}
dsm = m3/m2;
Info<< this->name() << " Sauter mean diameter, min, max = "
<< dsm.weightedAverage(dsm.mesh().V()).value()
<< ' ' << min(dsm).value()
<< ' ' << max(dsm).value()
<< endl;
return tDsm;
}
// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
Foam::diameterModels::populationBalanceModel::populationBalanceModel
@ -926,10 +860,10 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
IOobject
(
"Sui",
fluid_.time().timeName(),
fluid_.mesh()
fluid.time().timeName(),
fluid.mesh()
),
fluid_.mesh(),
mesh_,
dimensionedScalar("Sui", inv(dimTime), Zero)
),
coalescence_
@ -986,7 +920,7 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
(
IOobject
(
IOobject::groupName("alpha", this->name()),
IOobject::groupName("U", this->name()),
fluid.time().timeName(),
fluid.mesh(),
IOobject::NO_READ,
@ -999,8 +933,7 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
dimVelocity,
Zero
)
),
d_()
)
{
this->registerVelocityAndSizeGroups();
@ -1015,32 +948,6 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
<< exit(FatalError);
}
if (velocityGroups_.size() > 1)
{
d_.reset
(
new volScalarField
(
IOobject
(
IOobject::groupName("d", this->name()),
fluid.time().timeName(),
fluid.mesh(),
IOobject::NO_READ,
IOobject::AUTO_WRITE
),
fluid.mesh(),
dimensionedScalar
(
IOobject::groupName("d", this->name()),
dimLength,
Zero
)
)
);
}
if (coalescence_.size() != 0)
{
@ -1125,10 +1032,10 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
IOobject
(
"r",
fluid_.time().timeName(),
fluid_.mesh()
fluid.time().timeName(),
fluid.mesh()
),
fluid_.mesh(),
fluid.mesh(),
dimensionedScalar("r", dimless, Zero)
)
);
@ -1140,10 +1047,10 @@ Foam::diameterModels::populationBalanceModel::populationBalanceModel
IOobject
(
"r",
fluid_.time().timeName(),
fluid_.mesh()
fluid.time().timeName(),
fluid.mesh()
),
fluid_.mesh(),
fluid.mesh(),
dimensionedScalar("r", dimless, Zero)
)
);
@ -1250,11 +1157,11 @@ void Foam::diameterModels::populationBalanceModel::solve()
)
);
if (!solveOnFinalIterOnly || pimple_.finalIter())
{
calcAlphas();
calcVelocity();
if (!solveOnFinalIterOnly || pimple_.finalIter())
{
label nCorr(readLabel(solutionControls.lookup("nCorr")));
scalar tolerance
(
@ -1263,7 +1170,7 @@ void Foam::diameterModels::populationBalanceModel::solve()
if (nCorr > 0)
{
preSolve();
correct();
}
int iCorr = 0;
@ -1339,11 +1246,6 @@ void Foam::diameterModels::populationBalanceModel::solve()
}
}
if (velocityGroups_.size() > 1)
{
d_() = dsm();
}
volScalarField fAlpha0
(
*sizeGroups_.first()*sizeGroups_.first()->phase()

7
applications/solvers/multiphase/reactingEulerFoam/phaseSystems/populationBalanceModel/populationBalanceModel/populationBalanceModel.H
View File

@ -275,9 +275,6 @@ class populationBalanceModel
//- Average velocity
volVectorField U_;
//- Mean Sauter diameter
autoPtr<volScalarField> d_;
// Private member functions
@ -287,7 +284,7 @@ class populationBalanceModel
void createPhasePairs();
void preSolve();
void correct();
void birthByCoalescence(const label j, const label k);
@ -315,8 +312,6 @@ class populationBalanceModel
void calcVelocity();
tmp<volScalarField> dsm() const;
public: