/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright (C) 2010-2010 OpenCFD Ltd.
     \\/     M anipulation  |
-------------------------------------------------------------------------------
License
    This file is part of OpenFOAM.

    OpenFOAM is free software; you can redistribute it and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation; either version 3 of the License, or (at your
    option) any later version.

    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.

    You should have received a copy of the GNU General Public License
    along with OpenFOAM; if not, write to the Free Software Foundation,
    Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

\*----------------------------------------------------------------------------*/

#include "actuationDiskSource.H"
#include "volFields.H"
#include "fvMatrix.H"
#include "fvm.H"

// * * * * * * * * * * * * * * *  Member Functions * * * * * * * * * * * * * //

template<class RhoFieldType>
void Foam::actuationDiskSource::addActuationDiskAxialInertialResistance
(
    vectorField& Usource,
    const labelList& cells,
    const scalarField& V,
    const RhoFieldType& rho,
    const vectorField& U
) const
{
    scalar a = 1.0 - Cp_/Ct_;
    scalar totVol = 0.0;
    scalarField T(cells.size());
    vector uniDiskDir = diskDir_/mag(diskDir_);
    tensor E(tensor::zero);
    E.xx() = uniDiskDir.x();
    E.yy() = uniDiskDir.y();
    E.zz() = uniDiskDir.z();
    vectorField U1 = (1.0 - a)*U;
    forAll(cells, i)
    {
        totVol += V[cells[i]];
        T[i] = 2.0*rho[cells[i]]*diskArea_*mag(U1[cells[i]])*a/(1.0 - a);
    }
    forAll(cells, i)
    {
        Usource[cells[i]] += ((V[cells[i]]/totVol)*T[i]*E) & U1[cells[i]];
    }
}


// ************************************************************************* //