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BUG: nut{k,U}WallFunction: use viscous predictions in yPlus (fixes #1773,#1838)

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This commit is contained in:
Kutalmis Bercin
2021-08-09 16:34:43 +01:00
committed by Andrew Heather
parent da1afe816a
commit 6ed5e23536
2 changed files with 60 additions and 10 deletions
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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;
}