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Merge branch 'issue-1838-yPlus' into 'develop'

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BUG: fix yPlus predictions of nut wall functions

See merge request Development/openfoam!484
This commit is contained in:
Andrew Heather
2021-09-14 15:21:49 +00:00
parent fb88d4887b 6ed5e23536
commit 7c46daea0d
6 changed files with 105 additions and 21 deletions
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3
src/TurbulenceModels/incompressible/turbulentTransportModels/RAS/ShihQuadraticKE/ShihQuadraticKE.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2017 OpenFOAM Foundation
Copyright (C) 2019-2020 OpenCFD Ltd.
Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -29,7 +29,6 @@ License
#include "ShihQuadraticKE.H"
#include "bound.H"
#include "wallFvPatch.H"
#include "nutkWallFunctionFvPatchScalarField.H"
#include "addToRunTimeSelectionTable.H"
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

9
src/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutLowReWallFunction/nutLowReWallFunctionFvPatchScalarField.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2019 OpenCFD Ltd.
Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -116,11 +116,16 @@ yPlus() const
)
);
const scalarField& y = turbModel.y()[patchi];
const tmp<scalarField> tnuw = turbModel.nu(patchi);
const scalarField& nuw = tnuw();
const fvPatchVectorField& Uw = U(turbModel).boundaryField()[patchi];
return y*sqrt(nuw*mag(Uw.snGrad()))/nuw;
tmp<scalarField> tnuEff = turbModel.nuEff(patchi);
const scalarField& nuEff = tnuEff();
return y*sqrt(nuEff*mag(Uw.snGrad()))/nuw;
}

30
src/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutUWallFunction/nutUWallFunctionFvPatchScalarField.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016 OpenFOAM Foundation
Copyright (C) 2019 OpenCFD Ltd.
Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -183,7 +183,8 @@ Foam::tmp<Foam::scalarField>
Foam::nutUWallFunctionFvPatchScalarField::yPlus() const
{
const label patchi = patch().index();
const turbulenceModel& turbModel = db().lookupObject<turbulenceModel>
const auto& turbModel = db().lookupObject<turbulenceModel>
(
IOobject::groupName
(
@ -191,10 +192,33 @@ Foam::nutUWallFunctionFvPatchScalarField::yPlus() const
internalField().group()
)
);
const scalarField& y = turbModel.y()[patchi];
tmp<scalarField> tnuw = turbModel.nu(patchi);
const scalarField& nuw = tnuw();
tmp<scalarField> tnuEff = turbModel.nuEff(patchi);
const scalarField& nuEff = tnuEff();
const fvPatchVectorField& Uw = U(turbModel).boundaryField()[patchi];
const scalarField magUp(mag(Uw.patchInternalField() - Uw));
const scalarField magGradUw(mag(Uw.snGrad()));
return calcYPlus(magUp);
tmp<scalarField> tyPlus = calcYPlus(magUp);
scalarField& yPlus = tyPlus.ref();
forAll(yPlus, facei)
{
if (yPlusLam_ > yPlus[facei])
{
// viscous sublayer
yPlus[facei] =
y[facei]*sqrt(nuEff[facei]*magGradUw[facei])/nuw[facei];
}
}
return tyPlus;
}

40
src/TurbulenceModels/turbulenceModels/derivedFvPatchFields/wallFunctions/nutWallFunctions/nutkWallFunction/nutkWallFunctionFvPatchScalarField.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2011-2016, 2019 OpenFOAM Foundation
Copyright (C) 2019 OpenCFD Ltd.
Copyright (C) 2019-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -33,7 +33,6 @@ License
#include "wallFvPatch.H"
#include "addToRunTimeSelectionTable.H"
// * * * * * * * * * * * * Protected Member Functions * * * * * * * * * * * //
Foam::tmp<Foam::scalarField> Foam::nutkWallFunctionFvPatchScalarField::
@ -142,7 +141,7 @@ yPlus() const
{
const label patchi = patch().index();
const turbulenceModel& turbModel = db().lookupObject<turbulenceModel>
const auto& turbModel = db().lookupObject<turbulenceModel>
(
IOobject::groupName
(
@ -153,12 +152,39 @@ yPlus() const
const scalarField& y = turbModel.y()[patchi];
const tmp<volScalarField> tk = turbModel.k();
tmp<volScalarField> tk = turbModel.k();
const volScalarField& k = tk();
tmp<scalarField> kwc = k.boundaryField()[patchi].patchInternalField();
tmp<scalarField> nuw = turbModel.nu(patchi);
tmp<scalarField> tkwc = k.boundaryField()[patchi].patchInternalField();
const scalarField& kwc = tkwc();
return pow025(Cmu_)*y*sqrt(kwc)/nuw;
tmp<scalarField> tnuw = turbModel.nu(patchi);
const scalarField& nuw = tnuw();
tmp<scalarField> tnuEff = turbModel.nuEff(patchi);
const scalarField& nuEff = tnuEff();
const fvPatchVectorField& Uw = U(turbModel).boundaryField()[patchi];
const scalarField magGradUw(mag(Uw.snGrad()));
const scalar Cmu25 = pow025(Cmu_);
auto tyPlus = tmp<scalarField>::New(patch().size(), Zero);
auto& yPlus = tyPlus.ref();
forAll(yPlus, facei)
{
// inertial sublayer
yPlus[facei] = Cmu25*y[facei]*sqrt(kwc[facei])/nuw[facei];
if (yPlusLam_ > yPlus[facei])
{
// viscous sublayer
yPlus[facei] =
y[facei]*sqrt(nuEff[facei]*magGradUw[facei])/nuw[facei];
}
}
return tyPlus;
}

29
src/functionObjects/field/yPlus/yPlus.C
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2013-2016 OpenFOAM Foundation
Copyright (C) 2016-2020 OpenCFD Ltd.
Copyright (C) 2016-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -70,7 +70,8 @@ Foam::functionObjects::yPlus::yPlus
)
:
fvMeshFunctionObject(name, runTime, dict),
writeFile(obr_, name, typeName, dict)
writeFile(obr_, name, typeName, dict),
useWallFunction_(true)
{
read(dict);
@ -101,10 +102,14 @@ Foam::functionObjects::yPlus::yPlus
bool Foam::functionObjects::yPlus::read(const dictionary& dict)
{
fvMeshFunctionObject::read(dict);
writeFile::read(dict);
if (fvMeshFunctionObject::read(dict) && writeFile::read(dict))
{
useWallFunction_ = dict.getOrDefault("useWallFunction", true);
return true;
return true;
}
return false;
}
@ -139,7 +144,11 @@ bool Foam::functionObjects::yPlus::execute()
{
const fvPatch& patch = patches[patchi];
if (isA<nutWallFunctionFvPatchScalarField>(nutBf[patchi]))
if
(
isA<nutWallFunctionFvPatchScalarField>(nutBf[patchi])
&& useWallFunction_
)
{
const nutWallFunctionFvPatchScalarField& nutPf =
dynamic_cast<const nutWallFunctionFvPatchScalarField&>
@ -166,6 +175,14 @@ bool Foam::functionObjects::yPlus::execute()
WarningInFunction
<< "Unable to find turbulence model in the "
<< "database: yPlus will not be calculated" << endl;
if (postProcess)
{
WarningInFunction
<< "Please try to use the solver option -postProcess, e.g.:"
<< " <solver> -postProcess -func yPlus" << endl;
}
return false;
}

15
src/functionObjects/field/yPlus/yPlus.H
View File

@ -6,7 +6,7 @@
\\/ M anipulation |
-------------------------------------------------------------------------------
Copyright (C) 2013-2016 OpenFOAM Foundation
Copyright (C) 2015-2020 OpenCFD Ltd.
Copyright (C) 2015-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -50,6 +50,9 @@ Usage
type yPlus;
libs (fieldFunctionObjects);
// Optional entries
useWallFunction true;
// Optional (inherited) entries
...
}
@ -60,6 +63,10 @@ Usage
Property | Description | Type | Req'd | Dflt
type | Type name: yPlus | word | yes | -
libs | Library name: fieldFunctionObjects | word | yes | -
useWallFunction | Flag to use the local expressions of <!--
--> the selected nut wall function to compute yPlus, <!--
--> otherwise directly compute yPlus from flow field <!--
--> | bool | no | true
\endtable
The inherited entries are elaborated in:
@ -106,6 +113,12 @@ class yPlus
public fvMeshFunctionObject,
public writeFile
{
// Private Data
//- Flag to use the wall function expressions to compute yPlus
bool useWallFunction_;
// Private Member Functions
//- File header information