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Merge branch 'bug-1560-kEpsilonPhitF' into 'master'

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BUG: add switch for nu:DphitEff in kEpsilonPhitF (fixes #1560)

Closes #1560

See merge request Development/openfoam!329
This commit is contained in:
Andrew Heather
2020-01-21 12:28:09 +00:00
parent f62d6d96aa c234acf1ed
commit 835c392dd5
2 changed files with 70 additions and 44 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
src/TurbulenceModels/turbulenceModels/RAS/kEpsilonPhitF/kEpsilonPhitF.C
View File

@ -5,7 +5,7 @@
\\ / A nd | www.openfoam.com \\ / A nd | www.openfoam.com
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
Copyright (C) 2019 OpenCFD Ltd. Copyright (C) 2019-2020 OpenCFD Ltd.
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
This file is part of OpenFOAM. This file is part of OpenFOAM.
@ -121,9 +121,18 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
kEpsilonPhitFBase(), kEpsilonPhitFBase(),
includeNu_
(
Switch::getOrAddToDict
(
"includeNu",
this->coeffDict_,
true
)
),
Cmu_ Cmu_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Cmu", "Cmu",
this->coeffDict_, this->coeffDict_,
@ -132,7 +141,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Ceps1a_ Ceps1a_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Ceps1a", "Ceps1a",
this->coeffDict_, this->coeffDict_,
@ -141,7 +150,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Ceps1b_ Ceps1b_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Ceps1b", "Ceps1b",
this->coeffDict_, this->coeffDict_,
@ -150,7 +159,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Ceps1c_ Ceps1c_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Ceps1c", "Ceps1c",
this->coeffDict_, this->coeffDict_,
@ -159,7 +168,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Ceps2_ Ceps2_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Ceps2", "Ceps2",
this->coeffDict_, this->coeffDict_,
@ -168,7 +177,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Cf1_ Cf1_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Cf1", "Cf1",
this->coeffDict_, this->coeffDict_,
@ -177,7 +186,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Cf2_ Cf2_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Cf2", "Cf2",
this->coeffDict_, this->coeffDict_,
@ -186,7 +195,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
CL_ CL_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"CL", "CL",
this->coeffDict_, this->coeffDict_,
@ -195,7 +204,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
Ceta_ Ceta_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"Ceta", "Ceta",
this->coeffDict_, this->coeffDict_,
@ -204,7 +213,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
CT_ CT_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"CT", "CT",
this->coeffDict_, this->coeffDict_,
@ -213,7 +222,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
sigmaK_ sigmaK_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"sigmaK", "sigmaK",
this->coeffDict_, this->coeffDict_,
@ -222,7 +231,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
sigmaEps_ sigmaEps_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"sigmaEps", "sigmaEps",
this->coeffDict_, this->coeffDict_,
@ -231,7 +240,7 @@ kEpsilonPhitF<BasicTurbulenceModel>::kEpsilonPhitF
), ),
sigmaPhit_ sigmaPhit_
( (
dimensioned<scalar>::getOrAddToDict dimensionedScalar::getOrAddToDict
( (
"sigmaPhit", "sigmaPhit",
this->coeffDict_, this->coeffDict_,
@ -341,6 +350,7 @@ bool kEpsilonPhitF<BasicTurbulenceModel>::read()
{ {
if (eddyViscosity<RASModel<BasicTurbulenceModel>>::read()) if (eddyViscosity<RASModel<BasicTurbulenceModel>>::read())
{ {
includeNu_.readIfPresent("includeNu", this->coeffDict());
Cmu_.readIfPresent(this->coeffDict()); Cmu_.readIfPresent(this->coeffDict());
Ceps1a_.readIfPresent(this->coeffDict()); Ceps1a_.readIfPresent(this->coeffDict());
Ceps1b_.readIfPresent(this->coeffDict()); Ceps1b_.readIfPresent(this->coeffDict());

76
src/TurbulenceModels/turbulenceModels/RAS/kEpsilonPhitF/kEpsilonPhitF.H
View File

@ -5,7 +5,7 @@
\\ / A nd | www.openfoam.com \\ / A nd | www.openfoam.com
\\/ M anipulation | \\/ M anipulation |
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
Copyright (C) 2019 OpenCFD Ltd. Copyright (C) 2019-2020 OpenCFD Ltd.
------------------------------------------------------------------------------- -------------------------------------------------------------------------------
License License
This file is part of OpenFOAM. This file is part of OpenFOAM.
@ -34,11 +34,15 @@ Description
compressible flows. compressible flows.
The model is a three-transport-equation linear-eddy-viscosity turbulence The model is a three-transport-equation linear-eddy-viscosity turbulence
closure model alongside an elliptic relaxation equation: closure model alongside an elliptic relaxation equation.
- Turbulent kinetic energy, \c k,
- Turbulent kinetic energy dissipation rate, \c epsilon, \heading Input fields
- Normalised wall-normal fluctuating velocity scale, \c phit, \plaintable
- Elliptic relaxation factor, \c f. k | Turbulent kinetic energy [m2/s2]
epsilon | Turbulent kinetic energy dissipation rate [m2/s3]
phit | Normalised wall-normal fluctuating velocity scale [-]
f | Elliptic relaxation factor [1/s]
\endplaintable
Reference: Reference:
\verbatim \verbatim
@ -53,19 +57,20 @@ Description
\verbatim \verbatim
kEpsilonPhitFCoeffs kEpsilonPhitFCoeffs
{ {
Cmu 0.22, // Turbulent viscosity constant includeNu true; // include nu in (LUU: Eq. 17), see Notes
Ceps1a 1.4, // Model constant for epsilon Cmu 0.22; // Turbulent viscosity constant
Ceps1b 1.0, // Model constant for epsilon Ceps1a 1.4; // Model constant for epsilon
Ceps1c 0.05, // Model constant for epsilon Ceps1b 1.0; // Model constant for epsilon
Ceps2 1.9, // Model constant for epsilon Ceps1c 0.05; // Model constant for epsilon
Cf1 1.4, // Model constant for f Ceps2 1.9; // Model constant for epsilon
Cf2 0.3, // Model constant for f Cf1 1.4; // Model constant for f
CL 0.25, // Model constant for L Cf2 0.3; // Model constant for f
Ceta 110.0, // Model constant for L CL 0.25; // Model constant for L
CT 6.0, // Model constant for T Ceta 110.0; // Model constant for L
sigmaK 1.0, // Turbulent Prandtl number for k CT 6.0; // Model constant for T
sigmaEps 1.3, // Turbulent Prandtl number for epsilon sigmaK 1.0; // Turbulent Prandtl number for k
sigmaPhit 1.0, // Turbulent Prandtl number for phit = sigmaK sigmaEps 1.3; // Turbulent Prandtl number for epsilon
sigmaPhit 1.0; // Turbulent Prandtl number for phit = sigmaK
} }
\endverbatim \endverbatim
@ -74,6 +79,14 @@ Note
However, the name 'phi' preexisted in OpenFOAM; therefore, this name was However, the name 'phi' preexisted in OpenFOAM; therefore, this name was
replaced by 'phit' herein. replaced by 'phit' herein.
Including \c nu in \c DphitEff even though it is not present in (LUU:Eq. 17)
provided higher level of resemblance to benchmarks for the tests considered,
particularly for the peak skin friction (yet, pressure-related predictions
were unaffected). Users can switch off \c nu in \c DphitEff by using
\c includeNu entry in \c kEpsilonPhitFCoeffs as shown above in order to
follow the reference paper thereat. \c includeNu is left \c true by default.
See GitLab issue #1560.
SourceFiles SourceFiles
kEpsilonPhitF.C kEpsilonPhitF.C
@ -119,6 +132,8 @@ protected:
// Protected Data // Protected Data
Switch includeNu_;
// Model coefficients // Model coefficients
dimensionedScalar Cmu_; dimensionedScalar Cmu_;
@ -210,7 +225,7 @@ public:
//- Re-read model coefficients if they have changed //- Re-read model coefficients if they have changed
virtual bool read(); virtual bool read();
//- Return the effective diffusivity for k //- Return the effective diffusivity for k (LUU:Eq. 3)
tmp<volScalarField> DkEff() const tmp<volScalarField> DkEff() const
{ {
return tmp<volScalarField> return tmp<volScalarField>
@ -223,7 +238,7 @@ public:
); );
} }
//- Return the effective diffusivity for epsilon //- Return the effective diffusivity for epsilon (LUU:Eq. 4)
tmp<volScalarField> DepsilonEff() const tmp<volScalarField> DepsilonEff() const
{ {
return tmp<volScalarField> return tmp<volScalarField>
@ -236,17 +251,18 @@ public:
); );
} }
//- Return the effective diffusivity for phit //- Return the effective diffusivity for phit (LUU:Eq. 17)
tmp<volScalarField> DphitEff() const tmp<volScalarField> DphitEff() const
{ {
return tmp<volScalarField> auto tfld =
( tmp<volScalarField>::New("DphitEff", this->nut_/sigmaPhit_);
new volScalarField
( if (includeNu_)
"DphitEff", {
this->nut_/sigmaPhit_ + this->nu() tfld.ref() += this->nu();
) }
);
return tfld;
} }
//- Return the turbulent kinetic energy field //- Return the turbulent kinetic energy field