141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | foam-extend: Open Source CFD
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\\ / O peration | Version: 4.0
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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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Application
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Mach
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Description
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Calculates and optionally writes the local Mach number from the velocity
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field U at each time.
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The -nowrite option just outputs the max value without writing the field.
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\*---------------------------------------------------------------------------*/
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#include "calc.H"
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#include "basicPsiThermo.H"
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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void Foam::calc(const argList& args, const Time& runTime, const fvMesh& mesh)
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{
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bool writeResults = !args.optionFound("noWrite");
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IOobject Uheader
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(
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"U",
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runTime.timeName(),
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mesh,
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IOobject::MUST_READ
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);
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IOobject Theader
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(
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"T",
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runTime.timeName(),
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mesh,
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IOobject::MUST_READ
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);
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// Check U and T exists
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if (Uheader.headerOk() && Theader.headerOk())
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{
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autoPtr<volScalarField> MachPtr;
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volVectorField U(Uheader, mesh);
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if (isFile(runTime.constantPath()/"thermophysicalProperties"))
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{
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// thermophysical Mach
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autoPtr<basicPsiThermo> thermo
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(
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basicPsiThermo::New(mesh)
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);
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volScalarField Cp = thermo->Cp();
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volScalarField Cv = thermo->Cv();
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MachPtr.set
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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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runTime.timeName(),
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mesh
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),
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mag(U)/(sqrt((Cp/Cv)*(Cp - Cv)*thermo->T()))
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)
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);
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}
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else
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{
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// thermodynamic Mach
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IOdictionary thermoProps
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(
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IOobject
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(
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"thermodynamicProperties",
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runTime.constant(),
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mesh,
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IOobject::MUST_READ,
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IOobject::NO_WRITE
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)
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);
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dimensionedScalar R(thermoProps.lookup("R"));
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dimensionedScalar Cv(thermoProps.lookup("Cv"));
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volScalarField T(Theader, mesh);
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MachPtr.set
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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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runTime.timeName(),
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mesh
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),
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mag(U)/(sqrt(((Cv + R)/Cv)*R*T))
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)
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);
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}
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Info<< "Mach max : " << max(MachPtr()).value() << endl;
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if (writeResults)
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{
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MachPtr().write();
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}
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}
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else
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{
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Info<< " Missing U or T" << endl;
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}
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}
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// ************************************************************************* //
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