rotatingWallVelocityFvPatchVectorField.C

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    Copyright (C) 2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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#include "rotatingWallVelocityFvPatchVectorField.H"
#include "addToRunTimeSelectionTable.H"
#include "volFields.H"
#include "surfaceFields.H"

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

Foam::rotatingWallVelocityFvPatchVectorField::
rotatingWallVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchField<vector>(p, iF),
    origin_(),
    axis_(Zero),
    omega_(nullptr)
{}


Foam::rotatingWallVelocityFvPatchVectorField::
rotatingWallVelocityFvPatchVectorField
(
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const dictionary& dict
)
:
    fixedValueFvPatchField<vector>(p, iF, dict, IOobjectOption::NO_READ),
    origin_(dict.lookup("origin")),
    axis_(dict.lookup("axis")),
    omega_(Function1<scalar>::New("omega", dict, &db()))
{
    if (!this->readValueEntry(dict))
    {
        // Evaluate the wall velocity
        updateCoeffs();
    }
}


Foam::rotatingWallVelocityFvPatchVectorField::
rotatingWallVelocityFvPatchVectorField
(
    const rotatingWallVelocityFvPatchVectorField& ptf,
    const fvPatch& p,
    const DimensionedField<vector, volMesh>& iF,
    const fvPatchFieldMapper& mapper
)
:
    fixedValueFvPatchField<vector>(ptf, p, iF, mapper),
    origin_(ptf.origin_),
    axis_(ptf.axis_),
    omega_(ptf.omega_.clone())
{}


Foam::rotatingWallVelocityFvPatchVectorField::
rotatingWallVelocityFvPatchVectorField
(
    const rotatingWallVelocityFvPatchVectorField& rwvpvf
)
:
    fixedValueFvPatchField<vector>(rwvpvf),
    origin_(rwvpvf.origin_),
    axis_(rwvpvf.axis_),
    omega_(rwvpvf.omega_.clone())
{}


Foam::rotatingWallVelocityFvPatchVectorField::
rotatingWallVelocityFvPatchVectorField
(
    const rotatingWallVelocityFvPatchVectorField& rwvpvf,
    const DimensionedField<vector, volMesh>& iF
)
:
    fixedValueFvPatchField<vector>(rwvpvf, iF),
    origin_(rwvpvf.origin_),
    axis_(rwvpvf.axis_),
    omega_(rwvpvf.omega_.clone())
{}


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

void Foam::rotatingWallVelocityFvPatchVectorField::updateCoeffs()
{
    if (updated())
    {
        return;
    }

    const scalar t = this->db().time().timeOutputValue();
    scalar om = omega_->value(t);

    // Calculate the rotating wall velocity from the specification of the motion
    const vectorField Up
    (
        (-om)*((patch().Cf() - origin_) ^ (axis_/mag(axis_)))
    );

    // Remove the component of Up normal to the wall
    // just in case it is not exactly circular
    const vectorField n(patch().nf());
    vectorField::operator=(Up - n*(n & Up));

    fixedValueFvPatchVectorField::updateCoeffs();
}


void Foam::rotatingWallVelocityFvPatchVectorField::write(Ostream& os) const
{
    fvPatchField<vector>::write(os);
    os.writeEntry("origin", origin_);
    os.writeEntry("axis", axis_);
    omega_->writeData(os);
    fvPatchField<vector>::writeValueEntry(os);
}


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

namespace Foam
{
    makePatchTypeField
    (
        fvPatchVectorField,
        rotatingWallVelocityFvPatchVectorField
    );
}

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