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ENH: Added checks for input Reynolds stresses based on Lund coefficient constraints. Fixes #1124

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This commit is contained in:
Andrew Heather
2019-02-05 14:07:59 +00:00
parent edfd27f9e4
commit b6c5fc0ada
2 changed files with 77 additions and 10 deletions
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78
src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.C
View File

@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015 OpenFOAM Foundation
\\/ M anipulation | Copyright (C) 2016-2017 OpenCFD Ltd.
\\/ M anipulation | Copyright (C) 2016-2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -854,6 +854,8 @@ turbulentDFSEMInletFvPatchVectorField
{
eddy::debug = debug;
checkStresses(R_);
// Set UMean as patch area average value
UMean_ = gSum(U_*patch().magSf())/(gSum(patch().magSf()) + ROOTVSMALL);
}
@ -946,15 +948,75 @@ turbulentDFSEMInletFvPatchVectorField
{}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::turbulentDFSEMInletFvPatchVectorField::~
turbulentDFSEMInletFvPatchVectorField()
{}
// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
bool Foam::turbulentDFSEMInletFvPatchVectorField::checkStresses
(
const symmTensorField& Rf
)
{
// Perform checks based on constraints imposed by Lund coefficients
// a11..a33
for (const symmTensor& R : Rf)
{
if (R.xx() <= 0)
{
FatalErrorInFunction
<< "Reynold stress " << R
<< " does not obey the Lund coefficient constraint: "
<< "R.xx() > 0"
<< exit(FatalError);
}
scalar a11 = sqrt(R.xx());
scalar a21 = R.xy()/a11;
scalar a22_2 = R.yy() - sqr(a21);
if (a22_2 < 0)
{
FatalErrorInFunction
<< "Reynold stress " << R
<< " does not obey the Lund coefficient constraint: "
<< "R.yy() - sqr(a21) >= 0"
<< exit(FatalError);
}
scalar a22 = Foam::sqrt(a22_2);
scalar a31 = R.xz()/a11;
scalar a32 = (R.yz() - a21*a31)*a22;
scalar a33_2 = R.zz() - sqr(a31) - sqr(a32);
if (a33_2 < 0)
{
FatalErrorInFunction
<< "Reynold stress " << R
<< " does not obey the Lund coefficient constraint: "
<< "R.zz() - sqr(a31) - sqr(a32) >= 0"
<< exit(FatalError);
}
scalar a33 = Foam::sqrt(a33_2);
if (debug)
{
Pout<< "R: " << R
<< " a11:" << a11 << " a21:" << a21 << " a31:" << a31
<< " a21:" << a22 << " a32:" << a32
<< " a33:" << a33
<< endl;
}
}
return true;
}
void Foam::turbulentDFSEMInletFvPatchVectorField::autoMap
(
const fvPatchFieldMapper& m

9
src/finiteVolume/fields/fvPatchFields/derived/turbulentDFSEMInlet/turbulentDFSEMInletFvPatchVectorField.H
View File

@ -3,7 +3,7 @@
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration |
\\ / A nd | Copyright (C) 2015 OpenFOAM Foundation
\\/ M anipulation | Copyright (C) 2016 OpenCFD Ltd.
\\/ M anipulation | Copyright (C) 2016-2019 OpenCFD Ltd.
-------------------------------------------------------------------------------
License
This file is part of OpenFOAM.
@ -329,11 +329,16 @@ public:
);
}
virtual ~turbulentDFSEMInletFvPatchVectorField();
//- Destructor
virtual ~turbulentDFSEMInletFvPatchVectorField() = default;
// Member functions
//- Helper function to check that Reynold stresses are valid
static bool checkStresses(const symmTensorField& Rf);
// Mapping functions