438 lines
11 KiB
C++
438 lines
11 KiB
C++
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.1
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\\ / A nd | Web: http://www.foam-extend.org
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\\/ M anipulation | For copyright notice see file Copyright
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-------------------------------------------------------------------------------
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License
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This file is part of foam-extend.
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foam-extend is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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foam-extend is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with foam-extend. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "SCOPELaminarFlameSpeed.H"
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#include "addToRunTimeSelectionTable.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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namespace Foam
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{
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namespace laminarFlameSpeedModels
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{
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defineTypeNameAndDebug(SCOPE, 0);
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addToRunTimeSelectionTable
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(
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laminarFlameSpeed,
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SCOPE,
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dictionary
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);
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}
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}
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::laminarFlameSpeedModels::SCOPE::polynomial::polynomial
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(
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const dictionary& polyDict
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)
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:
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FixedList<scalar, 7>(polyDict.lookup("coefficients")),
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ll(readScalar(polyDict.lookup("lowerLimit"))),
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ul(readScalar(polyDict.lookup("upperLimit"))),
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llv(polyPhi(ll, *this)),
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ulv(polyPhi(ul, *this)),
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lu(0)
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{}
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Foam::laminarFlameSpeedModels::SCOPE::SCOPE
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(
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const dictionary& dict,
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const hhuCombustionThermo& ct
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)
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:
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laminarFlameSpeed(dict, ct),
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coeffsDict_(dict.subDict(typeName + "Coeffs").subDict(fuel_)),
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LFL_(readScalar(coeffsDict_.lookup("lowerFlamabilityLimit"))),
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UFL_(readScalar(coeffsDict_.lookup("upperFlamabilityLimit"))),
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SuPolyL_(coeffsDict_.subDict("lowerSuPolynomial")),
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SuPolyU_(coeffsDict_.subDict("upperSuPolynomial")),
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Texp_(readScalar(coeffsDict_.lookup("Texp"))),
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pexp_(readScalar(coeffsDict_.lookup("pexp"))),
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MaPolyL_(coeffsDict_.subDict("lowerMaPolynomial")),
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MaPolyU_(coeffsDict_.subDict("upperMaPolynomial"))
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{
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SuPolyL_.ll = max(SuPolyL_.ll, LFL_) + SMALL;
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SuPolyU_.ul = min(SuPolyU_.ul, UFL_) - SMALL;
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SuPolyL_.lu = 0.5*(SuPolyL_.ul + SuPolyU_.ll);
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SuPolyU_.lu = SuPolyL_.lu - SMALL;
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MaPolyL_.lu = 0.5*(MaPolyL_.ul + MaPolyU_.ll);
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MaPolyU_.lu = MaPolyL_.lu - SMALL;
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if (debug)
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{
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Info<< "phi Su (T = Tref, p = pref)" << endl;
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label n = 200;
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for (int i=0; i<n; i++)
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{
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scalar phi = (2.0*i)/n;
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Info<< phi << token::TAB << SuRef(phi) << endl;
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}
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}
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::laminarFlameSpeedModels::SCOPE::~SCOPE()
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{}
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// * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * * //
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inline Foam::scalar Foam::laminarFlameSpeedModels::SCOPE::polyPhi
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(
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scalar phi,
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const polynomial& a
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)
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{
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scalar x = phi - 1.0;
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return
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a[0]
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*(
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scalar(1)
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+ x*(a[1] + x*(a[2] + x*(a[3] + x*(a[4] + x*(a[5] + x*a[6])))))
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);
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}
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inline Foam::scalar Foam::laminarFlameSpeedModels::SCOPE::SuRef
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(
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scalar phi
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) const
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{
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if (phi < LFL_ || phi > UFL_)
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{
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// Return 0 beyond the flamibility limits
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return scalar(0);
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}
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else if (phi < SuPolyL_.ll)
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{
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// Use linear interpolation between the low end of the
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// lower polynomial and the lower flamibility limit
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return SuPolyL_.llv*(phi - LFL_)/(SuPolyL_.ll - LFL_);
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}
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else if (phi > SuPolyU_.ul)
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{
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// Use linear interpolation between the upper end of the
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// upper polynomial and the upper flamibility limit
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return SuPolyU_.ulv*(UFL_ - phi)/(UFL_ - SuPolyU_.ul);
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}
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else if (phi < SuPolyL_.lu)
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{
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// Evaluate the lower polynomial
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return polyPhi(phi, SuPolyL_);
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}
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else if (phi > SuPolyU_.lu)
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{
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// Evaluate the upper polynomial
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return polyPhi(phi, SuPolyU_);
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}
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else
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{
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FatalErrorIn("laminarFlameSpeedModels::SCOPE::SuRef(scalar phi)")
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<< "phi = " << phi
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<< " cannot be handled by SCOPE function with the "
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"given coefficients"
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<< exit(FatalError);
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return scalar(0);
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}
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}
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inline Foam::scalar Foam::laminarFlameSpeedModels::SCOPE::Ma
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(
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scalar phi
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) const
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{
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if (phi < MaPolyL_.ll)
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{
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// Beyond the lower limit assume Ma is constant
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return MaPolyL_.llv;
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}
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else if (phi > MaPolyU_.ul)
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{
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// Beyond the upper limit assume Ma is constant
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return MaPolyU_.ulv;
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}
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else if (phi < SuPolyL_.lu)
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{
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// Evaluate the lower polynomial
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return polyPhi(phi, MaPolyL_);
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}
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else if (phi > SuPolyU_.lu)
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{
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// Evaluate the upper polynomial
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return polyPhi(phi, MaPolyU_);
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}
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else
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{
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FatalErrorIn("laminarFlameSpeedModels::SCOPE::Ma(scalar phi)")
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<< "phi = " << phi
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<< " cannot be handled by SCOPE function with the "
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"given coefficients"
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<< exit(FatalError);
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return scalar(0);
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}
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}
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inline Foam::scalar Foam::laminarFlameSpeedModels::SCOPE::Su0pTphi
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(
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scalar p,
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scalar Tu,
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scalar phi
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) const
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{
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static const scalar Tref = 300.0;
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static const scalar pRef = 1.013e5;
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return SuRef(phi)*pow((Tu/Tref), Texp_)*pow((p/pRef), pexp_);
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}
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Foam::tmp<Foam::volScalarField> Foam::laminarFlameSpeedModels::SCOPE::Su0pTphi
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(
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const volScalarField& p,
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const volScalarField& Tu,
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scalar phi
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) const
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{
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tmp<volScalarField> tSu0
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(
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new volScalarField
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(
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IOobject
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(
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"Su0",
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p.time().timeName(),
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p.db(),
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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p.mesh(),
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dimensionedScalar("Su0", dimVelocity, 0.0)
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)
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);
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volScalarField& Su0 = tSu0();
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forAll(Su0, celli)
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{
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Su0[celli] = Su0pTphi(p[celli], Tu[celli], phi);
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}
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forAll(Su0.boundaryField(), patchi)
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{
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scalarField& Su0p = Su0.boundaryField()[patchi];
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const scalarField& pp = p.boundaryField()[patchi];
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const scalarField& Tup = Tu.boundaryField()[patchi];
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forAll(Su0p, facei)
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{
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Su0p[facei] = Su0pTphi(pp[facei], Tup[facei], phi);
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}
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}
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return tSu0;
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}
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Foam::tmp<Foam::volScalarField> Foam::laminarFlameSpeedModels::SCOPE::Su0pTphi
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(
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const volScalarField& p,
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const volScalarField& Tu,
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const volScalarField& phi
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) const
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{
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tmp<volScalarField> tSu0
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(
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new volScalarField
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(
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IOobject
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(
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"Su0",
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p.time().timeName(),
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p.db(),
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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p.mesh(),
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dimensionedScalar("Su0", dimVelocity, 0.0)
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)
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);
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volScalarField& Su0 = tSu0();
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forAll(Su0, celli)
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{
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Su0[celli] = Su0pTphi(p[celli], Tu[celli], phi[celli]);
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}
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forAll(Su0.boundaryField(), patchi)
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{
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scalarField& Su0p = Su0.boundaryField()[patchi];
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const scalarField& pp = p.boundaryField()[patchi];
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const scalarField& Tup = Tu.boundaryField()[patchi];
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const scalarField& phip = phi.boundaryField()[patchi];
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forAll(Su0p, facei)
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{
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Su0p[facei] =
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Su0pTphi
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(
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pp[facei],
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Tup[facei],
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phip[facei]
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);
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}
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}
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return tSu0;
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}
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Foam::tmp<Foam::volScalarField> Foam::laminarFlameSpeedModels::SCOPE::Ma
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(
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const volScalarField& phi
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) const
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{
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tmp<volScalarField> tMa
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(
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new volScalarField
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(
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IOobject
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(
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"Ma",
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phi.time().timeName(),
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phi.db(),
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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phi.mesh(),
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dimensionedScalar("Ma", dimless, 0.0)
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)
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);
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volScalarField& ma = tMa();
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forAll(ma, celli)
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{
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ma[celli] = Ma(phi[celli]);
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}
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forAll(ma.boundaryField(), patchi)
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{
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scalarField& map = ma.boundaryField()[patchi];
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const scalarField& phip = phi.boundaryField()[patchi];
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forAll(map, facei)
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{
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map[facei] = Ma(phip[facei]);
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}
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}
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return tMa;
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}
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Foam::tmp<Foam::volScalarField>
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Foam::laminarFlameSpeedModels::SCOPE::Ma() const
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{
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if (hhuCombustionThermo_.composition().contains("ft"))
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{
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const volScalarField& ft = hhuCombustionThermo_.composition().Y("ft");
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return Ma
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(
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dimensionedScalar
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(
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hhuCombustionThermo_.lookup("stoichiometricAirFuelMassRatio")
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)*ft/(scalar(1) - ft)
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);
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}
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else
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{
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const fvMesh& mesh = hhuCombustionThermo_.p().mesh();
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return tmp<volScalarField>
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(
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new volScalarField
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(
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IOobject
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(
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"Ma",
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mesh.time().timeName(),
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mesh,
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IOobject::NO_READ,
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IOobject::NO_WRITE
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),
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mesh,
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dimensionedScalar("Ma", dimless, Ma(equivalenceRatio_))
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)
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);
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}
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}
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Foam::tmp<Foam::volScalarField>
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Foam::laminarFlameSpeedModels::SCOPE::operator()() const
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{
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if (hhuCombustionThermo_.composition().contains("ft"))
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{
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const volScalarField& ft = hhuCombustionThermo_.composition().Y("ft");
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return Su0pTphi
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(
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hhuCombustionThermo_.p(),
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hhuCombustionThermo_.Tu(),
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dimensionedScalar
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(
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hhuCombustionThermo_.lookup("stoichiometricAirFuelMassRatio")
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)*ft/(scalar(1) - ft)
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);
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}
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else
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{
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return Su0pTphi
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(
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hhuCombustionThermo_.p(),
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hhuCombustionThermo_.Tu(),
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equivalenceRatio_
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);
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}
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}
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// ************************************************************************* //
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