fanFvPatchFields.C

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    Copyright (C) 2017-2021 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.

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

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

namespace Foam
{
    makePatchFieldType(scalar, fan);
}


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

template<>
void Foam::fanFvPatchField<Foam::scalar>::calcFanJump()
{
    if (this->cyclicPatch().owner())
    {
        const auto& phip =
            patch().lookupPatchField<surfaceScalarField>(phiName_);

        scalarField Un(max(phip/patch().magSf(), scalar(0)));

        // The non-dimensional parameters

        scalar rpm(0);
        scalar meanDiam(0);

        if (nonDimensional_)
        {
            rpm = rpm_->value(this->db().time().timeOutputValue());
            meanDiam = dm_->value(this->db().time().timeOutputValue());
        }

        if (uniformJump_)
        {
            const scalar area = gSum(patch().magSf());
            Un = gSum(Un*patch().magSf())/area;

            if (nonDimensional_)
            {
                // Create an non-dimensional velocity
                Un =
                (
                    120.0*Un
                  / stabilise
                    (
                        pow3(constant::mathematical::pi) * meanDiam * rpm,
                        VSMALL
                    )
                );
            }
        }

        if (phip.internalField().dimensions() == dimMass/dimTime)
        {
            Un /= patch().lookupPatchField<volScalarField>(rhoName_);
        }

        if (nonDimensional_)
        {
            scalarField deltap(this->jumpTable_->value(Un));

            // Convert non-dimensional deltap from curve into deltaP
            scalarField pdFan
            (
                deltap*pow4(constant::mathematical::pi)
              * sqr(meanDiam*rpm)/1800.0
            );

            this->setJump(pdFan);
        }
        else
        {
            this->setJump(jumpTable_->value(Un));
        }

        this->relax();
    }
}


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