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cavitationModels: Made insensitive to phase order

Browse Source 
The cavitation models used by the interFoam solver and the
compressibleVoF solver module can now be applied regardless of the
ordering of the liquid and vapour phases. A "liquid" keyword is now
required in the model specification in order to control which phase is
considered to be the condensed liquid state. Previously the liquid phase
was assumed to be the first of the two phases.
This commit is contained in:
Will Bainbridge
2022-11-15 12:52:41 +00:00
parent 9b373b2950
commit 9567bc0d4b
27 changed files with 307 additions and 166 deletions
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24
applications/solvers/modules/fluid/compressibleVoF/fvModels/VoFCavitation/VoFCavitation.C
View File

@ -96,21 +96,21 @@ void Foam::fv::compressible::VoFCavitation::addSup
if (fieldName == alphaName_)
{
volScalarField::Internal alphalCoeff
const volScalarField::Internal alpha1Coeff
(
1.0/mixture_.rho1()()
- mixture_.alpha1()()*(1.0/mixture_.rho1()() - 1.0/mixture_.rho2()())
);
const Pair<tmp<volScalarField::Internal>> mDotAlphal
const Pair<tmp<volScalarField::Internal>> mDot12Alpha
(
cavitation_->mDotAlphal()
cavitation_->mDot12Alpha()
);
const volScalarField::Internal vDotcAlphal(alphalCoeff*mDotAlphal[0]());
const volScalarField::Internal vDotvAlphal(alphalCoeff*mDotAlphal[1]());
const volScalarField::Internal vDot1Alpha(alpha1Coeff*mDot12Alpha[0]());
const volScalarField::Internal vDot2Alpha(alpha1Coeff*mDot12Alpha[1]());
eqn += fvm::Sp(vDotvAlphal - vDotcAlphal, eqn.psi()) + vDotcAlphal;
eqn += fvm::Sp(-vDot2Alpha - vDot1Alpha, eqn.psi()) + vDot1Alpha;
}
}
@ -140,17 +140,17 @@ void Foam::fv::compressible::VoFCavitation::addSup
1.0/mixture_.rho1()() - 1.0/mixture_.rho2()()
);
const Pair<tmp<volScalarField::Internal>> mDotP
const Pair<tmp<volScalarField::Internal>> mDot12P
(
cavitation_->mDotP()
cavitation_->mDot12P()
);
const volScalarField::Internal vDotcP(pCoeff*mDotP[0]);
const volScalarField::Internal vDotvP(pCoeff*mDotP[1]);
const volScalarField::Internal vDot1P(pCoeff*mDot12P[0]);
const volScalarField::Internal vDot2P(pCoeff*mDot12P[1]);
eqn +=
(vDotvP - vDotcP)*(cavitation_->pSat() - rho*gh)
- fvm::Sp(vDotvP - vDotcP, eqn.psi());
(vDot2P - vDot1P)*(cavitation_->pSat() - rho*gh)
- fvm::Sp(vDot2P - vDot1P, eqn.psi());
}
}

24
applications/solvers/multiphase/interFoam/fvModels/VoFCavitation/VoFCavitation.C
View File

@ -95,21 +95,21 @@ void Foam::fv::VoFCavitation::addSup
if (fieldName == alphaName_)
{
volScalarField::Internal alphalCoeff
const volScalarField::Internal alpha1Coeff
(
1.0/mixture_.rho1()
- mixture_.alpha1()()*(1.0/mixture_.rho1() - 1.0/mixture_.rho2())
);
const Pair<tmp<volScalarField::Internal>> mDotAlphal
const Pair<tmp<volScalarField::Internal>> mDot12Alpha
(
cavitation_->mDotAlphal()
cavitation_->mDot12Alpha()
);
const volScalarField::Internal vDotcAlphal(alphalCoeff*mDotAlphal[0]());
const volScalarField::Internal vDotvAlphal(alphalCoeff*mDotAlphal[1]());
const volScalarField::Internal vDot1Alpha(alpha1Coeff*mDot12Alpha[0]());
const volScalarField::Internal vDot2Alpha(alpha1Coeff*mDot12Alpha[1]());
eqn += fvm::Sp(vDotvAlphal - vDotcAlphal, eqn.psi()) + vDotcAlphal;
eqn += fvm::Sp(-vDot2Alpha - vDot1Alpha, eqn.psi()) + vDot1Alpha;
}
}
@ -139,17 +139,17 @@ void Foam::fv::VoFCavitation::addSup
1.0/mixture_.rho1() - 1.0/mixture_.rho2()
);
const Pair<tmp<volScalarField::Internal>> mDotP
const Pair<tmp<volScalarField::Internal>> mDot12P
(
cavitation_->mDotP()
cavitation_->mDot12P()
);
const volScalarField::Internal vDotcP(pCoeff*mDotP[0]);
const volScalarField::Internal vDotvP(pCoeff*mDotP[1]);
const volScalarField::Internal vDot1P(pCoeff*mDot12P[0]);
const volScalarField::Internal vDot2P(pCoeff*mDot12P[1]);
eqn +=
(vDotvP - vDotcP)*(cavitation_->pSat() - rho*gh)
- fvm::Sp(vDotvP - vDotcP, eqn.psi());
(vDot2P - vDot1P)*(cavitation_->pSat() - rho*gh)
- fvm::Sp(vDot2P - vDot1P, eqn.psi());
}
}

30
src/twoPhaseModels/compressibleCavitation/Kunz/Kunz.C
View File

@ -65,55 +65,53 @@ Foam::compressible::cavitationModels::Kunz::Kunz
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::Kunz::mDotAlphal() const
Foam::compressible::cavitationModels::Kunz::mDotcvAlphal() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal mcCoeff_(Cc_*phases_.rho2()()/tInf_);
const volScalarField::Internal mcCoeff_(Cc_*rhov()/tInf_);
const volScalarField::Internal mvCoeff_
(
Cv_*phases_.rho2()()/(0.5*phases_.rho1()()*sqr(UInf_)*tInf_)
Cv_*rhov()/(0.5*rhol()*sqr(UInf_)*tInf_)
);
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*sqr(limitedAlpha1)
mcCoeff_*sqr(limitedAlphal)
*max(p - pSat(), p0_)/max(p - pSat(), 0.01*pSat()),
mvCoeff_*min(p - pSat(), p0_)
-mvCoeff_*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::Kunz::mDotP() const
Foam::compressible::cavitationModels::Kunz::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal mcCoeff_(Cc_*phases_.rho2()()/tInf_);
const volScalarField::Internal mcCoeff_(Cc_*rhov()/tInf_);
const volScalarField::Internal mvCoeff_
(
Cv_*phases_.rho2()()/(0.5*phases_.rho1()()*sqr(UInf_)*tInf_)
Cv_*rhov()/(0.5*rhol()*sqr(UInf_)*tInf_)
);
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*sqr(limitedAlpha1)*(1.0 - limitedAlpha1)
mcCoeff_*sqr(limitedAlphal)*(1.0 - limitedAlphal)
*pos0(p - pSat())/max(p - pSat(), 0.01*pSat()),
(-mvCoeff_)*limitedAlpha1*neg(p - pSat())
(-mvCoeff_)*limitedAlphal*neg(p - pSat())
);
}

8
src/twoPhaseModels/compressibleCavitation/Kunz/Kunz.H
View File

@ -102,13 +102,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlphal() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the Kunz phaseChange model
virtual void correct();

19
src/twoPhaseModels/compressibleCavitation/Merkle/Merkle.C
View File

@ -67,45 +67,44 @@ Foam::compressible::cavitationModels::Merkle::Merkle
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::Merkle::mDotAlphal() const
Foam::compressible::cavitationModels::Merkle::mDotcvAlphal() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal mvCoeff_
(
Cv_*phases_.rho1()()/(0.5*sqr(UInf_)*tInf_*phases_.rho2()())
Cv_*rhol()/(0.5*sqr(UInf_)*tInf_*rhov())
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*max(p - pSat(), p0_),
mvCoeff_*min(p - pSat(), p0_)
-mvCoeff_*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::Merkle::mDotP() const
Foam::compressible::cavitationModels::Merkle::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
const volScalarField::Internal mvCoeff_
(
Cv_*phases_.rho1()()/(0.5*sqr(UInf_)*tInf_*phases_.rho2()())
Cv_*rhol()/(0.5*sqr(UInf_)*tInf_*rhov())
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*(1.0 - limitedAlpha1)*pos0(p - pSat()),
(-mvCoeff_)*limitedAlpha1*neg(p - pSat())
mcCoeff_*(1.0 - limitedAlphal)*pos0(p - pSat()),
(-mvCoeff_)*limitedAlphal*neg(p - pSat())
);
}

8
src/twoPhaseModels/compressibleCavitation/Merkle/Merkle.H
View File

@ -98,13 +98,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlphal() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the Merkle phaseChange model
virtual void correct();

40
src/twoPhaseModels/compressibleCavitation/SchnerrSauer/SchnerrSauer.C
View File

@ -73,13 +73,13 @@ Foam::compressible::cavitationModels::SchnerrSauer::SchnerrSauer
Foam::tmp<Foam::volScalarField::Internal>
Foam::compressible::cavitationModels::SchnerrSauer::rRb
(
const volScalarField::Internal& limitedAlpha1
const volScalarField::Internal& limitedAlphal
) const
{
return pow
(
((4*constant::mathematical::pi*n_)/3)
*limitedAlpha1/(1.0 + alphaNuc() - limitedAlpha1),
*limitedAlphal/(1.0 + alphaNuc() - limitedAlphal),
1.0/3.0
);
}
@ -99,65 +99,63 @@ Foam::compressible::cavitationModels::SchnerrSauer::pCoeff
const volScalarField::Internal& p
) const
{
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
const volScalarField::Internal rho
(
limitedAlpha1*phases_.rho1()()
+ (scalar(1) - limitedAlpha1)*phases_.rho2()()
limitedAlphal*rhol()
+ (scalar(1) - limitedAlphal)*rhov()
);
return
(3*phases_.rho1()()*phases_.rho2()())*sqrt(2/(3*phases_.rho1()()))
*rRb(limitedAlpha1)/(rho*sqrt(mag(p - pSat()) + 0.01*pSat()));
(3*rhol()*rhov())*sqrt(2/(3*rhol()))
*rRb(limitedAlphal)/(rho*sqrt(mag(p - pSat()) + 0.01*pSat()));
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::SchnerrSauer::mDotAlphal() const
Foam::compressible::cavitationModels::SchnerrSauer::mDotcvAlphal() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal pCoeff(this->pCoeff(p));
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
Cc_*limitedAlpha1*pCoeff*max(p - pSat(), p0_),
Cv_*(1.0 + alphaNuc() - limitedAlpha1)*pCoeff*min(p - pSat(), p0_)
Cc_*limitedAlphal*pCoeff*max(p - pSat(), p0_),
-Cv_*(1.0 + alphaNuc() - limitedAlphal)*pCoeff*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::compressible::cavitationModels::SchnerrSauer::mDotP() const
Foam::compressible::cavitationModels::SchnerrSauer::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal pCoeff(this->pCoeff(p));
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
const volScalarField::Internal apCoeff(limitedAlpha1*pCoeff);
const volScalarField::Internal apCoeff(limitedAlphal*pCoeff);
return Pair<tmp<volScalarField::Internal>>
(
Cc_*(1.0 - limitedAlpha1)*pos0(p - pSat())*apCoeff,
(-Cv_)*(1.0 + alphaNuc() - limitedAlpha1)*neg(p - pSat())*apCoeff
Cc_*(1.0 - limitedAlphal)*pos0(p - pSat())*apCoeff,
(-Cv_)*(1.0 + alphaNuc() - limitedAlphal)*neg(p - pSat())*apCoeff
);
}

12
src/twoPhaseModels/compressibleCavitation/SchnerrSauer/SchnerrSauer.H
View File

@ -82,9 +82,9 @@ class SchnerrSauer
dimensionedScalar alphaNuc() const;
//- Reciprocal bubble radius
tmp<volScalarField::Internal>rRb
tmp<volScalarField::Internal> rRb
(
const volScalarField::Internal& limitedAlpha1
const volScalarField::Internal& limitedAlphal
) const;
//- Part of the condensation and vapourisation rates
@ -118,13 +118,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlphal() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the SchnerrSauer phaseChange model
virtual void correct();

1
src/twoPhaseModels/compressibleCavitation/cavitationModel/cavitationModel.C
View File

@ -47,6 +47,7 @@ Foam::compressible::cavitationModel::cavitationModel
)
:
phases_(phases),
liquidIndex_(phases.index(dict.lookup<word>("liquid"))),
pSat_("pSat", dimPressure, dict.lookup("pSat"))
{}

58
src/twoPhaseModels/compressibleCavitation/cavitationModel/cavitationModel.H
View File

@ -56,13 +56,43 @@ protected:
// Protected data
//- Mixture properties
//- Phases
const compressibleTwoPhases& phases_;
//- Index of the liquid
const bool liquidIndex_;
//- Saturation vapour pressure
dimensionedScalar pSat_;
// Protected Member Functions
//- Return the liquid density
inline const volScalarField::Internal& alphal() const
{
return phases_.alpha(liquidIndex_);
}
//- Return the vapour density
inline const volScalarField::Internal& alphav() const
{
return phases_.alpha(!liquidIndex_);
}
//- Return the liquid density
inline const volScalarField::Internal& rhol() const
{
return phases_.rho(liquidIndex_);
}
//- Return the vapour density
inline const volScalarField::Internal& rhov() const
{
return phases_.rho(!liquidIndex_);
}
public:
//- Runtime type information
@ -109,20 +139,34 @@ public:
// Member Functions
//- Return const-access to the saturation vapour pressure
const dimensionedScalar& pSat() const
//- Return the saturation vapour pressure
inline const dimensionedScalar& pSat() const
{
return pSat_;
}
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const = 0;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlphal() const = 0;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const = 0;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const = 0;
//- Return the mass transfer rates of the two phases as coefficients to
// multiply the volume fraction of the other phase
inline Pair<tmp<volScalarField::Internal>> mDot12Alpha() const
{
return liquidIndex_ ? reverse(mDotcvAlphal()) : mDotcvAlphal();
}
//- Return the mass transfer rates of the two phases as coefficients to
// multiply (p - pSat)
inline Pair<tmp<volScalarField::Internal>> mDot12P() const
{
return liquidIndex_ ? reverse(mDotcvP()) : mDotcvP();
}
//- Correct the cavitation model
virtual void correct() = 0;

12
src/twoPhaseModels/compressibleTwoPhaseMixture/compressibleTwoPhases.H
View File

@ -77,11 +77,23 @@ public:
//- Return the thermo for phase 2
virtual const rhoThermo& thermo2() const = 0;
//- Return the density of a given phase
inline const rhoThermo& thermo(const bool index) const
{
return index ? thermo2() : thermo1();
}
//- Return the density of phase 1
virtual const volScalarField& rho1() const = 0;
//- Return the density of phase 2
virtual const volScalarField& rho2() const = 0;
//- Return the density of a given phase
inline const volScalarField& rho(const bool index) const
{
return index ? rho2() : rho1();
}
};

30
src/twoPhaseModels/incompressibleCavitation/Kunz/Kunz.C
View File

@ -54,8 +54,8 @@ Foam::cavitationModels::Kunz::Kunz
p0_("0", pSat().dimensions(), 0.0),
mcCoeff_(Cc_*phases_.rho2()/tInf_),
mvCoeff_(Cv_*phases_.rho2()/(0.5*phases_.rho1()*sqr(UInf_)*tInf_))
mcCoeff_(Cc_*rhov()/tInf_),
mvCoeff_(Cv_*rhov()/(0.5*rhol()*sqr(UInf_)*tInf_))
{
correct();
}
@ -64,43 +64,41 @@ Foam::cavitationModels::Kunz::Kunz
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::Kunz::mDotAlphal() const
Foam::cavitationModels::Kunz::mDotcvAlpha() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*sqr(limitedAlpha1)
mcCoeff_*sqr(limitedAlphal)
*max(p - pSat(), p0_)/max(p - pSat(), 0.01*pSat()),
mvCoeff_*min(p - pSat(), p0_)
-mvCoeff_*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::Kunz::mDotP() const
Foam::cavitationModels::Kunz::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*sqr(limitedAlpha1)*(1.0 - limitedAlpha1)
mcCoeff_*sqr(limitedAlphal)*(1.0 - limitedAlphal)
*pos0(p - pSat())/max(p - pSat(), 0.01*pSat()),
(-mvCoeff_)*limitedAlpha1*neg(p - pSat())
(-mvCoeff_)*limitedAlphal*neg(p - pSat())
);
}
@ -118,8 +116,8 @@ bool Foam::cavitationModels::Kunz::read(const dictionary& dict)
dict.lookup("Cc") >> Cc_;
dict.lookup("Cv") >> Cv_;
mcCoeff_ = Cc_*phases_.rho2()/tInf_;
mvCoeff_ = Cv_*phases_.rho2()/(0.5*phases_.rho1()*sqr(UInf_)*tInf_);
mcCoeff_ = Cc_*rhov()/tInf_;
mvCoeff_ = Cv_*rhov()/(0.5*rhol()*sqr(UInf_)*tInf_);
return true;
}

8
src/twoPhaseModels/incompressibleCavitation/Kunz/Kunz.H
View File

@ -103,13 +103,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlpha() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the Kunz phaseChange model
virtual void correct();

18
src/twoPhaseModels/incompressibleCavitation/Merkle/Merkle.C
View File

@ -55,7 +55,7 @@ Foam::cavitationModels::Merkle::Merkle
p0_("0", pSat().dimensions(), 0.0),
mcCoeff_(Cc_/(0.5*sqr(UInf_)*tInf_)),
mvCoeff_(Cv_*phases_.rho1()/(0.5*sqr(UInf_)*tInf_*phases_.rho2()))
mvCoeff_(Cv_*rhol()/(0.5*sqr(UInf_)*tInf_*rhov()))
{
correct();
}
@ -64,7 +64,7 @@ Foam::cavitationModels::Merkle::Merkle
// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::Merkle::mDotAlphal() const
Foam::cavitationModels::Merkle::mDotcvAlpha() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
@ -72,26 +72,26 @@ Foam::cavitationModels::Merkle::mDotAlphal() const
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*max(p - pSat(), p0_),
mvCoeff_*min(p - pSat(), p0_)
-mvCoeff_*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::Merkle::mDotP() const
Foam::cavitationModels::Merkle::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
mcCoeff_*(1.0 - limitedAlpha1)*pos0(p - pSat()),
(-mvCoeff_)*limitedAlpha1*neg(p - pSat())
mcCoeff_*(1.0 - limitedAlphal)*pos0(p - pSat()),
(-mvCoeff_)*limitedAlphal*neg(p - pSat())
);
}
@ -110,7 +110,7 @@ bool Foam::cavitationModels::Merkle::read(const dictionary& dict)
dict.lookup("Cv") >> Cv_;
mcCoeff_ = Cc_/(0.5*sqr(UInf_)*tInf_);
mvCoeff_ = Cv_*phases_.rho1()/(0.5*sqr(UInf_)*tInf_*phases_.rho2());
mvCoeff_ = Cv_*rhol()/(0.5*sqr(UInf_)*tInf_*rhov());
return true;
}

8
src/twoPhaseModels/incompressibleCavitation/Merkle/Merkle.H
View File

@ -97,13 +97,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlpha() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the Merkle phaseChange model
virtual void correct();

40
src/twoPhaseModels/incompressibleCavitation/SchnerrSauer/SchnerrSauer.C
View File

@ -70,13 +70,13 @@ Foam::cavitationModels::SchnerrSauer::SchnerrSauer
Foam::tmp<Foam::volScalarField::Internal>
Foam::cavitationModels::SchnerrSauer::rRb
(
const volScalarField::Internal& limitedAlpha1
const volScalarField::Internal& limitedAlphal
) const
{
return pow
(
((4*constant::mathematical::pi*n_)/3)
*limitedAlpha1/(1.0 + alphaNuc() - limitedAlpha1),
*limitedAlphal/(1.0 + alphaNuc() - limitedAlphal),
1.0/3.0
);
}
@ -96,65 +96,63 @@ Foam::cavitationModels::SchnerrSauer::pCoeff
const volScalarField::Internal& p
) const
{
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
const volScalarField::Internal rho
(
limitedAlpha1*phases_.rho1()
+ (scalar(1) - limitedAlpha1)*phases_.rho2()
limitedAlphal*rhol()
+ (scalar(1) - limitedAlphal)*rhov()
);
return
(3*phases_.rho1()*phases_.rho2())*sqrt(2/(3*phases_.rho1()))
*rRb(limitedAlpha1)/(rho*sqrt(mag(p - pSat()) + 0.01*pSat()));
(3*rhol()*rhov())*sqrt(2/(3*rhol()))
*rRb(limitedAlphal)/(rho*sqrt(mag(p - pSat()) + 0.01*pSat()));
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::SchnerrSauer::mDotAlphal() const
Foam::cavitationModels::SchnerrSauer::mDotcvAlpha() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal pCoeff(this->pCoeff(p));
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
return Pair<tmp<volScalarField::Internal>>
(
Cc_*limitedAlpha1*pCoeff*max(p - pSat(), p0_),
Cv_*(1.0 + alphaNuc() - limitedAlpha1)*pCoeff*min(p - pSat(), p0_)
Cc_*limitedAlphal*pCoeff*max(p - pSat(), p0_),
-Cv_*(1.0 + alphaNuc() - limitedAlphal)*pCoeff*min(p - pSat(), p0_)
);
}
Foam::Pair<Foam::tmp<Foam::volScalarField::Internal>>
Foam::cavitationModels::SchnerrSauer::mDotP() const
Foam::cavitationModels::SchnerrSauer::mDotcvP() const
{
const volScalarField::Internal& p =
phases_.mesh().lookupObject<volScalarField>("p");
const volScalarField::Internal pCoeff(this->pCoeff(p));
const volScalarField::Internal limitedAlpha1
const volScalarField::Internal limitedAlphal
(
min(max(phases_.alpha1()(), scalar(0)), scalar(1))
min(max(alphal(), scalar(0)), scalar(1))
);
const volScalarField::Internal apCoeff(limitedAlpha1*pCoeff);
const volScalarField::Internal apCoeff(limitedAlphal*pCoeff);
return Pair<tmp<volScalarField::Internal>>
(
Cc_*(1.0 - limitedAlpha1)*pos0(p - pSat())*apCoeff,
(-Cv_)*(1.0 + alphaNuc() - limitedAlpha1)*neg(p - pSat())*apCoeff
Cc_*(1.0 - limitedAlphal)*pos0(p - pSat())*apCoeff,
(-Cv_)*(1.0 + alphaNuc() - limitedAlphal)*neg(p - pSat())*apCoeff
);
}

12
src/twoPhaseModels/incompressibleCavitation/SchnerrSauer/SchnerrSauer.H
View File

@ -80,9 +80,9 @@ class SchnerrSauer
dimensionedScalar alphaNuc() const;
//- Reciprocal bubble radius
tmp<volScalarField::Internal>rRb
tmp<volScalarField::Internal> rRb
(
const volScalarField::Internal& limitedAlpha1
const volScalarField::Internal& limitedAlphal
) const;
//- Part of the condensation and vapourisation rates
@ -116,13 +116,13 @@ public:
// Member Functions
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlpha() const;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const;
//- Correct the SchnerrSauer phaseChange model
virtual void correct();

1
src/twoPhaseModels/incompressibleCavitation/cavitationModel/cavitationModel.C
View File

@ -44,6 +44,7 @@ Foam::cavitationModel::cavitationModel
)
:
phases_(phases),
liquidIndex_(phases.index(dict.lookup<word>("liquid"))),
pSat_("pSat", dimPressure, dict.lookup("pSat"))
{}

56
src/twoPhaseModels/incompressibleCavitation/cavitationModel/cavitationModel.H
View File

@ -57,10 +57,40 @@ protected:
//- Mixture properties
const incompressibleTwoPhases& phases_;
//- Index of the liquid
const bool liquidIndex_;
//- Saturation vapour pressure
dimensionedScalar pSat_;
// Protected Member Functions
//- Return the liquid density
inline const volScalarField::Internal& alphal() const
{
return phases_.alpha(liquidIndex_);
}
//- Return the vapour density
inline const volScalarField::Internal& alphav() const
{
return phases_.alpha(!liquidIndex_);
}
//- Return the liquid density
inline const dimensionedScalar& rhol() const
{
return phases_.rho(liquidIndex_);
}
//- Return the vapour density
inline const dimensionedScalar& rhov() const
{
return phases_.rho(!liquidIndex_);
}
public:
//- Runtime type information
@ -107,20 +137,34 @@ public:
// Member Functions
//- Return const-access to the saturation vapour pressure
const dimensionedScalar& pSat() const
//- Return the saturation vapour pressure
inline const dimensionedScalar& pSat() const
{
return pSat_;
}
//- Return the mass condensation and vaporisation rates as a
// coefficient to multiply (1 - alphal) for the condensation rate
// and a coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotAlphal() const = 0;
// coefficient to multiply alphav for the condensation rate and a
// coefficient to multiply alphal for the vaporisation rate
virtual Pair<tmp<volScalarField::Internal>> mDotcvAlpha() const = 0;
//- Return the mass condensation and vaporisation rates as coefficients
// to multiply (p - pSat)
virtual Pair<tmp<volScalarField::Internal>> mDotP() const = 0;
virtual Pair<tmp<volScalarField::Internal>> mDotcvP() const = 0;
//- Return the mass transfer rates of the two phases as coefficients to
// multiply the volume fraction of the other phase
inline Pair<tmp<volScalarField::Internal>> mDot12Alpha() const
{
return liquidIndex_ ? reverse(mDotcvAlpha()) : mDotcvAlpha();
}
//- Return the mass transfer rates of the two phases as coefficients to
// multiply (p - pSat)
inline Pair<tmp<volScalarField::Internal>> mDot12P() const
{
return liquidIndex_ ? reverse(mDotcvP()) : mDotcvP();
}
//- Correct the cavitation model
virtual void correct() = 0;

11
src/twoPhaseModels/incompressibleTwoPhaseMixture/incompressibleTwoPhases.H
View File

@ -52,6 +52,7 @@ class incompressibleTwoPhases
{
public:
//- Runtime type information
TypeName("incompressibleTwoPhases");
@ -69,11 +70,17 @@ public:
// Member Functions
//- Return const-access to phase1 density
//- Return the density of phase1
virtual const dimensionedScalar& rho1() const = 0;
//- Return const-access to phase2 density
//- Return the density of phase2
virtual const dimensionedScalar& rho2() const = 0;
//- Return the density of a given phase
inline const dimensionedScalar& rho(const bool index) const
{
return index ? rho2() : rho1();
}
};

31
src/twoPhaseModels/twoPhaseMixture/twoPhases.H
View File

@ -50,6 +50,7 @@ class twoPhases
{
public:
//- Runtime type information
TypeName("twoPhases");
@ -73,11 +74,37 @@ public:
return alpha1().mesh();
}
//- Return the phase-fraction of phase 1
//- Return the index associated with a given phase name
inline bool index(const word& name) const
{
if (alpha1().group() == name)
{
return false;
}
if (alpha2().group() == name)
{
return true;
}
FatalErrorInFunction
<< "Index of phase " << name << " requested from phases"
<< alpha1().group() << " and " << alpha2().group()
<< exit(FatalError);
return false;
}
//- Return the volume-fraction of phase 1
virtual const volScalarField& alpha1() const = 0;
//- Return the phase-fraction of phase 2
//- Return the volume-fraction of phase 2
virtual const volScalarField& alpha2() const = 0;
//- Return the volume-fraction of a given phase
const volScalarField& alpha(const bool index) const
{
return index ? alpha2() : alpha1();
}
};

4
tutorials/modules/compressibleVoF/ballValve/0/alpha.water → tutorials/modules/compressibleVoF/ballValve/0/alpha.vapour
View File

@ -10,13 +10,13 @@ FoamFile
format ascii;
class volScalarField;
location "0";
object alpha.water;
object alpha.vapour;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
dimensions [0 0 0 0 0 0 0];
internalField uniform 1;
internalField uniform 0;
boundaryField
{

2
tutorials/modules/compressibleVoF/ballValve/constant/fvModels
View File

@ -22,6 +22,8 @@ VoFCavitation
model SchnerrSauer;
liquid water;
pSat 2300;
n 1.6e+13;

2
tutorials/modules/compressibleVoF/ballValve/constant/phaseProperties
View File

@ -14,7 +14,7 @@ FoamFile
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
phases (water vapour);
phases (vapour water);
pMin 100;

2
tutorials/modules/compressibleVoF/ballValve/system/fvSolution
View File

@ -16,7 +16,7 @@ FoamFile
solvers
{
"alpha.water.*"
"alpha.vapour.*"
{
nAlphaCorr 2;
nAlphaSubCycles 1;

6
tutorials/multiphase/interFoam/RAS/propeller/constant/fvModels
View File

@ -26,6 +26,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
UInf 20.0;
tInf 0.005; // L = 0.1 m
Cc 1000;
@ -36,6 +38,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
UInf 20.0;
tInf 0.005; // L = 0.1 m
Cc 80;
@ -46,6 +50,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
n 1.6e+13;
dNuc 2.0e-06;
Cc 1;

6
tutorials/multiphase/interFoam/laminar/cavitatingBullet/constant/fvModels
View File

@ -26,6 +26,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
UInf 20.0;
tInf 0.005; // L = 0.1 m
Cc 1000;
@ -36,6 +38,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
UInf 20.0;
tInf 0.005; // L = 0.1 m
Cc 80;
@ -46,6 +50,8 @@ VoFCavitation
{
pSat 2300; // Saturation pressure
liquid water;
n 1.6e+13;
dNuc 2.0e-06;
Cc 1;