turbulentVFVel .C file

/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
   \\    /   O peration     |
    \\  /    A nd           | Copyright held by original author
     \\/     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 2 of the License, or (at your
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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\*---------------------------------------------------------------------------*/

#include "turbulentVolumeFlowVelocityFvPatchVectorField.H"
#include "addToRunTimeSelectionTable.H"
#include "fvPatchFieldMapper.H"
#include "volFields.H"
#include "surfaceFields.H"

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

namespace Foam
{

// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

turbulentVolumeFlowVelocityFvPatchVectorField::turbulentVolumeFlowVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchVectorField(p, iF),
    volumeFlowRate_(0),
    n_(1, 0, 0),
    y_(0, 1, 0)
{}


turbulentVolumeFlowVelocityFvPatchVectorField::turbulentVolumeFlowVelocityFvPatchVectorField
(
    const turbulentVolumeFlowVelocityFvPatchVectorField& ptf,
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    fixedValueFvPatchVectorField(ptf, p, iF, mapper),
    volumeFlowRate_(ptf.volumeFlowRate_),
    n_(ptf.n_),
    y_(ptf.y_)
{}


turbulentVolumeFlowVelocityFvPatchVectorField::turbulentVolumeFlowVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const dictionary& dict
)
:
    fixedValueFvPatchVectorField(p, iF),
    volumeFlowRate_(readScalar(dict.lookup("volumeFlowRate"))),
    n_(dict.lookup("n")),
    y_(dict.lookup("y"))
{
    if (mag(n_) < SMALL || mag(y_) < SMALL)
    {
        FatalErrorIn("turbulentVolumeFlowVelocityFvPatchVectorField(dict)")
            << "n or y given with zero size not correct"
            << abort(FatalError);
    }

    n_ /= mag(n_);
    y_ /= mag(y_);

    evaluate();
}


turbulentVolumeFlowVelocityFvPatchVectorField::turbulentVolumeFlowVelocityFvPatchVectorField
(
    const turbulentVolumeFlowVelocityFvPatchVectorField& fcvpvf,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchVectorField(fcvpvf, iF),
    volumeFlowRate_(fcvpvf.volumeFlowRate_),
    n_(fcvpvf.n_),
    y_(fcvpvf.y_)
{}


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

void turbulentVolumeFlowVelocityFvPatchVectorField::updateCoeffs()
{
    if (updated())
    {
        return;
    }
    // Get range and orientation
    boundBox bb(patch().patch().localPoints(), true);

    vector ctr = 0.5*(bb.max() + bb.min());

    const vectorField& c = patch().Cf();

    // Calculate mean flow velocity and peak velocity
    double dHid = mag(bb.max() - bb.min());
    double rHid = 0.5*dHid;

    double nPowerInverse = 1.0/nPower_;

    double meanU = volumeFlowRate_/(constant::mathematical::pi*pow(rHid,2.0));
    double peakU = meanU*(((nPower_ + 1.0)*(2.0*nPower_ + 1.0))/(2.0*pow(nPower_,2.0)));

    // Calculate local 1-D coordinate for the n-power law profile
    scalarField coord = 2*((c - ctr) & y_)/((bb.max() - bb.min()) & y_);

    vectorField::operator=(n_*peakU*pow((1.0 - coord),nPowerInverse));
}


// Write
void turbulentVolumeFlowVelocityFvPatchVectorField::write(Ostream& os) const
{
    fvPatchVectorField::write(os);
    os.writeKeyword("volumeFlowRate")
        << volumeFlowRate_ << token::END_STATEMENT << nl;
    os.writeKeyword("n")
        << y_ << token::END_STATEMENT << nl;
    os.writeKeyword("nPower")
        << n_ << token::END_STATEMENT << nl;
    os.writeKeyword("y")
        << y_ << token::END_STATEMENT << nl;
    writeEntry("value", os);
}


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

makePatchTypeField(fvPatchVectorField, turbulentVolumeFlowVelocityFvPatchVectorField);

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

} // End namespace Foam

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