src/lagrangian/dieselSpray/spraySubModels/injectorModel/hollowCone/hollowCone.C

   1 /*---------------------------------------------------------------------------*\
   2   =========                 |
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   5     \\  /    A nd           | Copyright (C) 1991-2009 OpenCFD Ltd.
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   7 -------------------------------------------------------------------------------
   8 License
   9     This file is part of OpenFOAM.
  10
  11     OpenFOAM 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 2 of the License, or (at your
  14     option) any later version.
  15
  16     OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
  17     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18     FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  19     for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with OpenFOAM; if not, write to the Free Software Foundation,
  23     Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  24
  25 \*---------------------------------------------------------------------------*/
  26
  27 #include "hollowCone.H"
  28 #include "addToRunTimeSelectionTable.H"
  29 #include "mathematicalConstants.H"
  30
  31 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
  32
  33 namespace Foam
  34 {
  35
  36 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
  37
  38 defineTypeNameAndDebug(hollowConeInjector, 0);
  39
  40 addToRunTimeSelectionTable
  41 (
  42     injectorModel,
  43     hollowConeInjector,
  44     dictionary
  45 );
  46
  47
  48 // * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //
  49
  50 // Construct from components
  51 hollowConeInjector::hollowConeInjector
  52 (
  53     const dictionary& dict,
  54     spray& sm
  55 )
  56 :
  57     injectorModel(dict, sm),
  58     hollowConeDict_(dict.subDict(typeName + "Coeffs")),
  59     dropletPDF_
  60     (
  61         pdf::New
  62         (
  63             hollowConeDict_.subDict("dropletPDF"),
  64             sm.rndGen()
  65         )
  66     ),
  67     innerAngle_(hollowConeDict_.lookup("innerConeAngle")),
  68     outerAngle_(hollowConeDict_.lookup("outerConeAngle"))
  69 {
  70
  71     if (sm.injectors().size() != innerAngle_.size())
  72     {
  73         FatalError << "hollowConeInjector::hollowConeInjector"
  74             << "(const dictionary& dict, spray& sm)\n"
  75             << "Wrong number of entries in innerAngle"
  76             << abort(FatalError);
  77     }
  78
  79     if (sm.injectors().size() != outerAngle_.size())
  80     {
  81         FatalError << "hollowConeInjector::hollowConeInjector"
  82             << "(const dictionary& dict, spray& sm)\n"
  83             << "Wrong number of entries in outerAngle"
  84             << abort(FatalError);
  85     }
  86
  87     scalar referencePressure = sm.ambientPressure();
  88
  89     // correct velocityProfile
  90     forAll(sm.injectors(), i)
  91     {
  92         sm.injectors()[i].properties()->correctProfiles(sm.fuels(), referencePressure);
  93     }
  94
  95 }
  96
  97
  98 // * * * * * * * * * * * * * * * * Destructor  * * * * * * * * * * * * * * * //
  99
 100 hollowConeInjector::~hollowConeInjector()
 101 {}
 102
 103
 104 // * * * * * * * * * * * * * * * Member Functions  * * * * * * * * * * * * * //
 105
 106 scalar hollowConeInjector::d0
 107 (
 108     const label,
 109     const scalar
 110 ) const
 111 {
 112     return dropletPDF_->sample();
 113 }
 114
 115
 116 vector hollowConeInjector::direction
 117 (
 118     const label n,
 119     const label hole,
 120     const scalar time,
 121     const scalar d
 122 ) const
 123 {
 124     scalar angle = innerAngle_[n] + rndGen_.scalar01()*(outerAngle_[n]-innerAngle_[n]);
 125     scalar alpha = sin(angle*mathematicalConstant::pi/360.0);
 126     scalar dcorr = cos(angle*mathematicalConstant::pi/360.0);
 127     scalar beta = 2.0*mathematicalConstant::pi*rndGen_.scalar01();
 128
 129     // randomly distributed vector normal to the injection vector
 130     vector normal = vector::zero;
 131
 132     if (sm_.twoD())
 133     {
 134         scalar reduce = 0.01;
 135         // correct beta if this is a 2D run
 136         // map it onto the 'angleOfWedge'
 137
 138         beta *= (1.0-2.0*reduce)*sm_.angleOfWedge()/(2.0*mathematicalConstant::pi);
 139         beta += reduce*sm_.angleOfWedge();
 140         normal = alpha*
 141         (
 142             sm_.axisOfWedge()*cos(beta) +
 143             sm_.axisOfWedgeNormal()*sin(beta)
 144         );
 145     }
 146     else
 147     {
 148         normal = alpha*
 149         (
 150             injectors_[n].properties()->tan1(hole)*cos(beta) +
 151             injectors_[n].properties()->tan2(hole)*sin(beta)
 152         );
 153     }
 154
 155     // set the direction of injection by adding the normal vector
 156     vector dir = dcorr*injectors_[n].properties()->direction(hole, time) + normal;
 157     dir /= mag(dir);
 158
 159     return dir;
 160
 161 }
 162
 163 scalar hollowConeInjector::velocity
 164 (
 165     const label i,
 166     const scalar time
 167 ) const
 168 {
 169     const injectorType& it = sm_.injectors()[i].properties();
 170     if (it.pressureIndependentVelocity())
 171     {
 172         return it.getTableValue(it.velocityProfile(), time);
 173     }
 174     else
 175     {
 176         scalar Pref = sm_.ambientPressure();
 177         scalar Pinj = it.getTableValue(it.injectionPressureProfile(), time);
 178         scalar rho = sm_.fuels().rho(Pinj, it.T(time), it.X());
 179         scalar dp = max(0.0, Pinj - Pref);
 180         return sqrt(2.0*dp/rho);
 181     }
 182
 183 }
 184
 185 scalar hollowConeInjector::averageVelocity
 186 (
 187     const label i
 188 ) const
 189 {
 190     const injectorType& it = sm_.injectors()[i].properties();
 191     scalar dt = it.teoi() - it.tsoi();
 192     return it.integrateTable(it.velocityProfile())/dt;
 193 }
 194
 195 } // End namespace Foam
 196
 197 // ************************************************************************* //