151 lines
4.0 KiB
C
151 lines
4.0 KiB
C
/*---------------------------------------------------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration |
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\\ / A nd | Copyright (C) 1991-2010 OpenCFD Ltd.
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\\/ M anipulation |
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-------------------------------------------------------------------------------
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License
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This file is part of OpenFOAM.
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OpenFOAM 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
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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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 OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
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\*---------------------------------------------------------------------------*/
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#include "forceCoeffs.H"
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#include "dictionary.H"
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#include "Time.H"
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#include "Pstream.H"
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// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
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defineTypeNameAndDebug(Foam::forceCoeffs, 0);
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// * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
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Foam::forceCoeffs::forceCoeffs
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(
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const word& name,
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const objectRegistry& obr,
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const dictionary& dict,
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const bool loadFromFiles
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)
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:
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forces(name, obr, dict, loadFromFiles),
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liftDir_(vector::zero),
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dragDir_(vector::zero),
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pitchAxis_(vector::zero),
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magUInf_(0.0),
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lRef_(0.0),
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Aref_(0.0)
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{
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read(dict);
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}
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// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
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Foam::forceCoeffs::~forceCoeffs()
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{}
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// * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
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void Foam::forceCoeffs::read(const dictionary& dict)
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{
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if (active_)
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{
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forces::read(dict);
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// Directions for lift and drag forces, and pitch moment
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dict.lookup("liftDir") >> liftDir_;
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dict.lookup("dragDir") >> dragDir_;
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dict.lookup("pitchAxis") >> pitchAxis_;
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// Free stream velocity magnitude
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dict.lookup("magUInf") >> magUInf_;
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// Reference length and area scales
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dict.lookup("lRef") >> lRef_;
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dict.lookup("Aref") >> Aref_;
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}
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}
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void Foam::forceCoeffs::writeFileHeader()
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{
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if (forcesFilePtr_.valid())
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{
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forcesFilePtr_()
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<< "# Time" << tab << "Cd" << tab << "Cl" << tab << "Cm" << endl;
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}
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}
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void Foam::forceCoeffs::execute()
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{
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// Do nothing - only valid on write
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}
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void Foam::forceCoeffs::end()
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{
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// Do nothing - only valid on write
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}
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void Foam::forceCoeffs::write()
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{
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if (active_)
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{
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// Create the forces file if not already created
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makeFile();
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forcesMoments fm = forces::calcForcesMoment();
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scalar pDyn = 0.5*rhoRef_*magUInf_*magUInf_;
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vector totForce = fm.first().first() + fm.first().second();
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vector totMoment = fm.second().first() + fm.second().second();
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scalar liftForce = totForce & liftDir_;
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scalar dragForce = totForce & dragDir_;
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scalar pitchMoment = totMoment & pitchAxis_;
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scalar Cl = liftForce/(Aref_*pDyn);
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scalar Cd = dragForce/(Aref_*pDyn);
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scalar Cm = pitchMoment/(Aref_*lRef_*pDyn);
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if (Pstream::master())
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{
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forcesFilePtr_()
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<< obr_.time().value() << tab
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<< Cd << tab << Cl << tab << Cm << endl;
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if (log_)
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{
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Info<< "forceCoeffs output:" << nl
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<< " Cd = " << Cd << nl
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<< " Cl = " << Cl << nl
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<< " Cm = " << Cm << nl
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<< endl;
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}
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}
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}
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}
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// ************************************************************************* //
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