freeflow/rans/twoeq/lowrekepsilon/volumevariables.hh

Go to the documentation of this file.

// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
//
// SPDX-FileCopyrightInfo: Copyright © DuMux Project contributors, see AUTHORS.md in root folder
// SPDX-License-Identifier: GPL-3.0-or-later
//
#ifndef DUMUX_LOWREKEPSILON_VOLUME_VARIABLES_HH
#define DUMUX_LOWREKEPSILON_VOLUME_VARIABLES_HH
 
#include <dumux/common/parameters.hh>
#include <dumux/freeflow/rans/volumevariables.hh>
 
namespace Dumux {
 
template <class Traits, class NSVolumeVariables>
class LowReKEpsilonVolumeVariables
:  public RANSVolumeVariables<Traits, NSVolumeVariables>
{
    using RANSParentType = RANSVolumeVariables<Traits, NSVolumeVariables>;
 
    using Scalar = typename Traits::PrimaryVariables::value_type;
 
public:
    using Indices = typename Traits::ModelTraits::Indices;
 
    template<class ElementSolution, class Problem, class Element, class SubControlVolume>
    void update(const ElementSolution &elemSol,
                const Problem &problem,
                const Element &element,
                const SubControlVolume& scv)
    {
        RANSParentType::updateNavierStokesVolVars(elemSol, problem, element, scv);
        updateRANSProperties(elemSol, problem, element, scv);
    }
 
    template<class ElementSolution, class Problem, class Element, class SubControlVolume>
    void updateRANSProperties(const ElementSolution &elemSol,
                              const Problem &problem,
                              const Element &element,
                              const SubControlVolume& scv)
    {
        RANSParentType::updateRANSProperties(elemSol, problem, element, scv);
        turbulentKineticEnergy_ = elemSol[0][Indices::turbulentKineticEnergyIdx];
        dissipationTilde_ = elemSol[0][Indices::dissipationIdx];
        storedDissipationTilde_ = problem.storedDissipationTilde(RANSParentType::elementIdx());
        storedTurbulentKineticEnergy_ = problem.storedTurbulentKineticEnergy(RANSParentType::elementIdx());
        stressTensorScalarProduct_ = problem.stressTensorScalarProduct(RANSParentType::elementIdx());
        if (problem.useStoredEddyViscosity())
            RANSParentType::setDynamicEddyViscosity_(problem.storedDynamicEddyViscosity(RANSParentType::elementIdx()));
        else
            RANSParentType::setDynamicEddyViscosity_(calculateEddyViscosity());
        RANSParentType::calculateEddyDiffusivity(problem);
        RANSParentType::calculateEddyThermalConductivity(problem);
    }
 
    Scalar calculateEddyViscosity()
    {
        return cMu() * fMu() * turbulentKineticEnergy() * turbulentKineticEnergy()
               / dissipationTilde() *  RANSParentType::density();
    }
 
    Scalar turbulentKineticEnergy() const
    { return turbulentKineticEnergy_; }
 
    Scalar dissipationTilde() const
    { return dissipationTilde_; }
 
    Scalar storedTurbulentKineticEnergy() const
    { return storedTurbulentKineticEnergy_; }
 
    Scalar storedDissipationTilde() const
    { return storedDissipationTilde_; }
 
    Scalar stressTensorScalarProduct() const
    { return stressTensorScalarProduct_; }
 
    const Scalar reT() const
    {
        return turbulentKineticEnergy() * turbulentKineticEnergy()
               / RANSParentType::kinematicViscosity() / dissipationTilde();
    }
 
    const Scalar reY() const
    {
        using std::sqrt;
        return sqrt(turbulentKineticEnergy()) * RANSParentType::wallDistance()
               / RANSParentType::kinematicViscosity();
    }
 
    const Scalar cMu() const
    { return 0.09; }
 
    const Scalar sigmaK() const
    { return 1.0; }
 
    const Scalar sigmaEpsilon() const
    { return 1.3; }
 
    const Scalar cOneEpsilon() const
    { return 1.35; }
 
    const Scalar cTwoEpsilon() const
    { return 1.8; }
 
    const Scalar dValue() const
    {
        return 2.0 * RANSParentType::kinematicViscosity() * turbulentKineticEnergy()
               / RANSParentType::wallDistance() / RANSParentType::wallDistance();
    }
 
    const Scalar fMu() const
    {
        using std::exp;
        return 1.0 - exp(-0.0115 * RANSParentType::yPlus());
    }
 
    const Scalar fOne() const
    { return 1.0; }
 
    const Scalar fTwo() const
    {
        using std::exp;
        return 1.0 - 0.22 * exp(-1.0 * (reT() * reT() / 6.0 / 6.0));
    }
 
    const Scalar eValue() const
    {
        using std::exp;
        return -2.0 * RANSParentType::kinematicViscosity() * dissipationTilde()
                / RANSParentType::wallDistance() / RANSParentType::wallDistance()
                * exp(-0.5 * RANSParentType::yPlus());
    }
 
protected:
    Scalar turbulentKineticEnergy_ = 0.0;
    Scalar dissipationTilde_ = 0.0;
    Scalar storedTurbulentKineticEnergy_ = 0.0;
    Scalar storedDissipationTilde_ = 0.0;
    Scalar stressTensorScalarProduct_ = 0.0;
};
 
} // end namespace Dumux
 
#endif