limitTemperature.C

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/*---------------------------------------------------------------------------*\
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  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
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    Copyright (C) 2012-2017 OpenFOAM Foundation
    Copyright (C) 2018-2021 OpenCFD Ltd.
-------------------------------------------------------------------------------
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.
 
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    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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#include "limitTemperature.H"
#include "fvMesh.H"
#include "basicThermo.H"
#include "addToRunTimeSelectionTable.H"
 
// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
namespace Foam
{
namespace fv
{
    defineTypeNameAndDebug(limitTemperature, 0);
    addToRunTimeSelectionTable(option, limitTemperature, dictionary);
}
}
 
 
// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
 
Foam::fv::limitTemperature::limitTemperature
(
    const word& name,
    const word& modelType,
    const dictionary& dict,
    const fvMesh& mesh
)
:
    fv::cellSetOption(name, modelType, dict, mesh),
    Tmin_(coeffs_.get<scalar>("min")),
    Tmax_(coeffs_.get<scalar>("max")),
    phase_(coeffs_.getOrDefault<word>("phase", word::null))
{
    // Set the field name to that of the energy
    // field from which the temperature is obtained
    const auto& thermo =
        mesh_.lookupObject<basicThermo>
        (
            IOobject::groupName(basicThermo::dictName, phase_)
        );
 
    fieldNames_.resize(1, thermo.he().name());
 
    fv::option::resetApplied();
}
 
 
// * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 
bool Foam::fv::limitTemperature::read(const dictionary& dict)
{
    if (fv::cellSetOption::read(dict))
    {
        coeffs_.readEntry("min", Tmin_);
        coeffs_.readEntry("max", Tmax_);
 
        if (Tmax_ < Tmin_)
        {
            FatalIOErrorInFunction(dict)
                << "Minimum temperature limit cannot exceed maximum limit" << nl
                << "min = " << Tmin_ << nl
                << "max = " << Tmax_
                << exit(FatalIOError);
        }
 
        if (Tmin_ < 0)
        {
            FatalIOErrorInFunction(dict)
                << "Minimum temperature limit cannot be negative" << nl
                << "min = " << Tmin_
                << exit(FatalIOError);
        }
 
        return true;
    }
 
    return false;
}
 
 
void Foam::fv::limitTemperature::correct(volScalarField& he)
{
    const auto& thermo =
        mesh_.lookupObject<basicThermo>
        (
            IOobject::groupName(basicThermo::dictName, phase_)
        );
 
    scalarField Tmin(cells_.size(), Tmin_);
    scalarField Tmax(cells_.size(), Tmax_);
 
    scalarField heMin(thermo.he(thermo.p(), Tmin, cells_));
    scalarField heMax(thermo.he(thermo.p(), Tmax, cells_));
 
    scalarField& hec = he.primitiveFieldRef();
 
    const scalarField& T = thermo.T();
 
    scalar Tmin0 = min(T);
    scalar Tmax0 = max(T);
 
    // Count nTotCells ourselves
    // (maybe only applying on a subset)
    label nBelowMin(0);
    label nAboveMax(0);
    const label nTotCells(returnReduce(cells_.size(), sumOp<label>()));
 
    forAll(cells_, i)
    {
        const label celli = cells_[i];
        if (hec[celli] < heMin[i])
        {
            hec[celli] = heMin[i];
            ++nBelowMin;
        }
        else if (hec[celli] > heMax[i])
        {
            hec[celli] = heMax[i];
            ++nAboveMax;
        }
    }
 
    reduce(nBelowMin, sumOp<label>());
    reduce(nAboveMax, sumOp<label>());
 
    reduce(Tmin0, minOp<scalar>());
    reduce(Tmax0, maxOp<scalar>());
 
    // Percent, max 2 decimal places
    const auto percent = [](scalar num, label denom) -> scalar
    {
        return (denom ? 1e-2*round(1e4*num/denom) : 0);
    };
 
    Info<< type() << ' ' << name_ << " Lower limited " << nBelowMin << " ("
        << percent(nBelowMin, nTotCells)
        << "%) of cells, with min limit " << Tmin_ << endl;
 
    Info<< type() << ' ' << name_ << " Upper limited " << nAboveMax << " ("
        << percent(nAboveMax, nTotCells)
        << "%) of cells, with max limit " << Tmax_ << endl;
 
    Info<< type() << ' ' << name_ << " Unlimited Tmin " << Tmin0 << endl;
    Info<< type() << ' ' << name_ << " Unlimited Tmax " << Tmax0 << endl;
 
 
    // Handle boundaries in the case of 'all'
    bool changedValues = (nBelowMin || nAboveMax);
    if (!cellSetOption::useSubMesh())
    {
        volScalarField::Boundary& bf = he.boundaryFieldRef();
 
        forAll(bf, patchi)
        {
            fvPatchScalarField& hep = bf[patchi];
 
            if (!hep.fixesValue())
            {
                const scalarField& pp = thermo.p().boundaryField()[patchi];
 
                scalarField Tminp(pp.size(), Tmin_);
                scalarField Tmaxp(pp.size(), Tmax_);
 
                scalarField heMinp(thermo.he(pp, Tminp, patchi));
                scalarField heMaxp(thermo.he(pp, Tmaxp, patchi));
 
                forAll(hep, facei)
                {
                    if (hep[facei] < heMinp[facei])
                    {
                        hep[facei] = heMinp[facei];
                        changedValues = true;
                    }
                    else if (hep[facei] > heMaxp[facei])
                    {
                        hep[facei] = heMaxp[facei];
                        changedValues = true;
                    }
                }
            }
        }
    }
 
 
    if (returnReduce(changedValues, orOp<bool>()))
    {
        // We've changed internal values so give
        // boundary conditions opportunity to correct
        he.correctBoundaryConditions();
    }
}
 
 
// ************************************************************************* //