src/lagrangian/dieselSpray/spraySubModels/evaporationModel/RutlandFlashBoil/RutlandFlashBoil.H

   1 /*---------------------------------------------------------------------------*\
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   8 License
   9     This file is part of foam-extend.
  10
  11     foam-extend is free software: you can redistribute it and/or modify it
  12     under the terms of the GNU General Public License as published by the
  13     Free Software Foundation, either version 3 of the License, or (at your
  14     option) any later version.
  15
  16     foam-extend is distributed in the hope that it will be useful, but
  17     WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19     General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.
  23
  24 Class
  25     Foam::RutlandFlashBoil
  26
  27 Description
  28     Evaporation model with flash boiling.
  29
  30     Evaporation model that takes into account of:
  31       - flash boiling of the liquid core and droplets
  32       - superheated vaporization of a boiling droplet
  33
  34     Accurated description in
  35     @verbatim
  36     B. Zuo, A.M. Gomes, C.J. Rutland
  37     "Modeling Superheated Fuel Spray Vaporization"
  38     Int. Journal of Engine Research, 2000. Vol. 1, pp. 321-326
  39     @endverbatim
  40 \*---------------------------------------------------------------------------*/
  41
  42 #ifndef RutlandFlashBoil_H
  43 #define RutlandFlashBoil_H
  44
  45 #include "evaporationModel.H"
  46
  47 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  48
  49 namespace Foam
  50 {
  51
  52 /*---------------------------------------------------------------------------*\
  53                            Class RutlandFlashBoil Declaration
  54 \*---------------------------------------------------------------------------*/
  55
  56 class RutlandFlashBoil
  57 :
  58     public evaporationModel
  59 {
  60
  61 private:
  62
  63     // Private data
  64
  65         dictionary evapDict_;
  66         scalar preReScFactor_;
  67         scalar ReExponent_;
  68         scalar ScExponent_;
  69
  70         word evaporationScheme_;
  71         label nEvapIter_;
  72
  73
  74 public:
  75
  76     //- Runtime type information
  77         TypeName("RutlandFlashBoil");
  78
  79
  80     // Constructors
  81
  82         //- Construct from dictionary
  83         RutlandFlashBoil
  84         (
  85             const dictionary& dict
  86         );
  87
  88
  89     // Destructor
  90
  91         ~RutlandFlashBoil();
  92
  93
  94     // Member Functions
  95
  96         bool evaporation() const;
  97
  98        //- Correlation for the Sherwood Number
  99         scalar Sh
 100         (
 101             const scalar ReynoldsNumber,
 102             const scalar SchmidtNumber
 103         ) const;
 104
 105         //- Return the evaporation relaxation time
 106         scalar relaxationTime
 107         (
 108             const scalar diameter,
 109             const scalar liquidDensity,
 110             const scalar rhoFuelVapor,
 111             const scalar massDiffusionCoefficient,
 112             const scalar ReynoldsNumber,
 113             const scalar SchmidtNumber,
 114             const scalar Xs,
 115             const scalar Xf,
 116             const scalar m0,
 117             const scalar dm,
 118             const scalar dt
 119         ) const;
 120
 121         scalar boilingTime
 122         (
 123             const scalar liquidDensity,
 124             const scalar cpFuel,
 125             const scalar heatOfVapour,
 126             const scalar kappa,
 127             const scalar Nusselt,
 128             const scalar deltaTemp,
 129             const scalar diameter,
 130             const scalar liquidCore,
 131             const scalar time,
 132             const scalar tDrop,
 133             const scalar tBoilingSurface,
 134             const scalar vapourSurfaceEnthalpy,
 135             const scalar vapourFarEnthalpy,
 136             const scalar cpGas,
 137             const scalar temperature,
 138             const scalar kLiquid
 139         ) const;
 140
 141         inline label nEvapIter() const;
 142 };
 143
 144
 145 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 146
 147 } // End namespace Foam
 148
 149 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 150
 151 #endif
 152
 153 // ************************************************************************* //