ReactingMultiphaseParcel.H

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License
    This file is part of OpenFOAM.
 
    OpenFOAM is free software: you can redistribute it and/or modify it
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Class
    Foam::ReactingMultiphaseParcel
 
Description
    Multiphase variant of the reacting parcel class with one/two-way coupling
    with the continuous phase.
 
SourceFiles
    ReactingMultiphaseParcelI.H
    ReactingMultiphaseParcel.C
    ReactingMultiphaseParcelIO.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef ReactingMultiphaseParcel_H
#define ReactingMultiphaseParcel_H
 
#include "particle.H"
#include "fluidThermo.H"
#include "demandDrivenEntry.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
 
template<class ParcelType>
class ReactingMultiphaseParcel;
 
template<class ParcelType>
Ostream& operator<<
(
    Ostream&,
    const ReactingMultiphaseParcel<ParcelType>&
);
 
/*---------------------------------------------------------------------------*\
                Class ReactingMultiphaseParcelName Declaration
\*---------------------------------------------------------------------------*/
 
TemplateName(ReactingMultiphaseParcel);
 
 
/*---------------------------------------------------------------------------*\
                  Class ReactingMultiphaseParcel Declaration
\*---------------------------------------------------------------------------*/
 
template<class ParcelType>
class ReactingMultiphaseParcel
:
    public ParcelType,
    public ReactingMultiphaseParcelName
{
    // Private Data
 
        //- Size in bytes of the fields
        static const std::size_t sizeofFields_;
 
 
public:
 
    // IDs of phases in ReactingParcel phase list (Y)
 
        static const label GAS;
        static const label LIQ;
        static const label SLD;
 
 
    //- Class to hold reacting multiphase particle constant properties
    class constantProperties
    :
        public ParcelType::constantProperties
    {
        // Private Data
 
            //- Devolatilisation activation temperature [K]
            demandDrivenEntry<scalar> TDevol_;
 
            //- Latent heat of devolatilisation [J/kg]
            demandDrivenEntry<scalar> LDevol_;
 
            //- Fraction of enthalpy retained by parcel due to surface
            //  reactions
            demandDrivenEntry<scalar> hRetentionCoeff_;
 
 
    public:
 
        // Constructors
 
            //- Null constructor
            constantProperties();
 
            //- Copy constructor
            constantProperties(const constantProperties& cp);
 
            //- Construct from dictionary
            constantProperties(const dictionary& parentDict);
 
 
        // Access
 
            //- Return const access to the devolatilisation temperature
            inline scalar TDevol() const;
 
            //- Return const access to the latent heat of devolatilisation
            inline scalar LDevol() const;
 
            //- Return const access to the fraction of enthalpy retained by
            //  parcel due to surface reactions
            inline scalar hRetentionCoeff() const;
    };
 
 
    //- Use base tracking data
    typedef typename ParcelType::trackingData trackingData;
 
 
private:
 
    // Private Member Functions
 
        //- Return the mixture effective specific heat capacity
        template<class TrackCloudType>
        scalar CpEff
        (
            TrackCloudType& cloud,
            trackingData& td,
            const scalar p,
            const scalar T,
            const label idG,
            const label idL,
            const label idS
        ) const;
 
        //- Return the mixture effective sensible enthalpy
        template<class TrackCloudType>
        scalar hsEff
        (
            TrackCloudType& cloud,
            trackingData& td,
            const scalar p,
            const scalar T,
            const label idG,
            const label idL,
            const label idS
        ) const;
 
        //- Return the mixture effective latent heat
        template<class TrackCloudType>
        scalar LEff
        (
            TrackCloudType& cloud,
            trackingData& td,
            const scalar p,
            const scalar T,
            const label idG,
            const label idL,
            const label idS
        ) const;
 
        //- Update the mass fractions (Y, YGas, YLiquid, YSolid)
        scalar updateMassFractions
        (
            const scalar mass0,
            const scalarField& dMassGas,
            const scalarField& dMassLiquid,
            const scalarField& dMassSolid
        );
 
 
protected:
 
    // Protected data
 
        // Parcel properties
 
            //- Initial mass [kg]
            scalar mass0_;
 
            //- Mass fractions of gases []
            scalarField YGas_;
 
            //- Mass fractions of liquids []
            scalarField YLiquid_;
 
            //- Mass fractions of solids []
            scalarField YSolid_;
 
            //- Flag to identify if the particle can devolatilise and combust
            //  Combustion possible only after volatile content falls below
            //  threshold value.  States include:
            //  0 = can devolatilise, cannot combust but can change
            //  1 = can devolatilise, can combust
            // -1 = cannot devolatilise or combust, and cannot change
            label canCombust_;
 
 
    // Protected Member Functions
 
        //- Calculate Devolatilisation
        template<class TrackCloudType>
        void calcDevolatilisation
        (
            TrackCloudType& cloud,
            trackingData& td,
            const scalar dt,           // timestep
            const scalar Ts,           // surface temperature
            const scalar d,            // diameter
            const scalar T,            // temperature
            const scalar mass,         // mass
            const scalar mass0,        // mass (initial on injection)
            const scalarField& YGasEff,// gas component mass fractions
            const scalarField& YLiquidEff,// liquid component mass fractions
            const scalarField& YSolidEff,// solid component mass fractions
            label& canCombust,          // 'can combust' flag
            scalarField& dMassDV,      // mass transfer - local to particle
            scalar& Sh,                // explicit particle enthalpy source
            scalar& N,                 // flux of species emitted from particle
            scalar& NCpW,              // sum of N*Cp*W of emission species
            scalarField& Cs            // carrier conc. of emission species
        ) const;
 
        //- Calculate surface reactions
        template<class TrackCloudType>
        void calcSurfaceReactions
        (
            TrackCloudType& cloud,
            trackingData& td,
            const scalar dt,           // timestep
            const scalar d,            // diameter
            const scalar T,            // temperature
            const scalar mass,         // mass
            const label canCombust,     // 'can combust' flag
            const scalar N,            // flux of species emitted from particle
            const scalarField& YMix,   // mixture mass fractions
            const scalarField& YGas,   // gas-phase mass fractions
            const scalarField& YLiquid,// liquid-phase mass fractions
            const scalarField& YSolid, // solid-phase mass fractions
            scalarField& dMassSRGas,   // gas-phase mass transfer - local
            scalarField& dMassSRLiquid,// liquid-phase mass transfer - local
            scalarField& dMassSRSolid, // solid-phase mass transfer - local
            scalarField& dMassSRCarrier, // carrier phase mass transfer
            scalar& Sh,                // explicit particle enthalpy source
            scalar& dhsTrans           // sensible enthalpy transfer to carrier
        ) const;
 
 
public:
 
    // Static Data Members
 
        //- String representation of properties
        AddToPropertyList
        (
            ParcelType,
            " mass0"
          + " nGas(Y1..YN)"
          + " nLiquid(Y1..YN)"
          + " nSolid(Y1..YN)"
        );
 
 
    // Constructors
 
        //- Construct from mesh, coordinates and topology
        //  Other properties initialised as null
        inline ReactingMultiphaseParcel
        (
            const polyMesh& mesh,
            const barycentric& coordinates,
            const label celli,
            const label tetFacei,
            const label tetPti,
            const label facei
        );
 
        //- Construct from a position and a cell, searching for the rest of the
        //  required topology. Other properties are initialised as null.
        inline ReactingMultiphaseParcel
        (
            const polyMesh& mesh,
            const vector& position,
            const label celli,
            label& nLocateBoundaryHits
        );
 
        //- Construct from Istream
        ReactingMultiphaseParcel(Istream& is, bool readFields = true);
 
        //- Construct as a copy
        ReactingMultiphaseParcel(const ReactingMultiphaseParcel& p);
 
        //- Construct and return a clone
        virtual autoPtr<particle> clone() const
        {
            return autoPtr<particle>(new ReactingMultiphaseParcel(*this));
        }
 
        //- Construct from Istream and return
        static autoPtr<ReactingMultiphaseParcel> New(Istream& is)
        {
            return
                autoPtr<ReactingMultiphaseParcel>
                (
                    new ReactingMultiphaseParcel(is)
                );
        }
 
 
    // Member Functions
 
        // Access
 
            //- Return const access to initial mass [kg]
            inline scalar mass0() const;
 
            //- Return const access to mass fractions of gases
            inline const scalarField& YGas() const;
 
            //- Return const access to mass fractions of liquids
            inline const scalarField& YLiquid() const;
 
            //- Return const access to mass fractions of solids
            inline const scalarField& YSolid() const;
 
            //- Return const access to the canCombust flag
            inline label canCombust() const;
 
 
        // Edit
 
            //- Return access to initial mass [kg]
            inline scalar& mass0();
 
            //- Return access to mass fractions of gases
            inline scalarField& YGas();
 
            //- Return access to mass fractions of liquids
            inline scalarField& YLiquid();
 
            //- Return access to mass fractions of solids
            inline scalarField& YSolid();
 
            //- Return access to the canCombust flag
            inline label& canCombust();
 
 
        // Main calculation loop
 
            //- Set cell values
            template<class TrackCloudType>
            void setCellValues(TrackCloudType& cloud, trackingData& td);
 
            //- Correct cell values using latest transfer information
            template<class TrackCloudType>
            void cellValueSourceCorrection
            (
                TrackCloudType& cloud,
                trackingData& td,
                const scalar dt
            );
 
            //- Update parcel properties over the time interval
            template<class TrackCloudType>
            void calc
            (
                TrackCloudType& cloud,
                trackingData& td,
                const scalar dt
            );
 
 
        // I-O
 
            //- Read
            template<class CloudType, class CompositionType>
            static void readFields
            (
                CloudType& c,
                const CompositionType& compModel
            );
 
            //- Read - no composition
            template<class CloudType>
            static void readFields(CloudType& c);
 
            //- Write
            template<class CloudType, class CompositionType>
            static void writeFields
            (
                const CloudType& c,
                const CompositionType& compModel
            );
 
            //- Read - composition supplied
            template<class CloudType>
            static void writeFields(const CloudType& c);
 
 
    // Ostream Operator
 
        friend Ostream& operator<< <ParcelType>
        (
            Ostream&,
            const ReactingMultiphaseParcel<ParcelType>&
        );
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "ReactingMultiphaseParcelI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#ifdef NoRepository
    #include "ReactingMultiphaseParcel.C"
#endif
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //