1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2009 OpenCFD Ltd.
7 -------------------------------------------------------------------------------
9 This file is part of OpenFOAM.
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23 Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 \*---------------------------------------------------------------------------*/
27 #include "definedHollowCone.H"
28 #include "addToRunTimeSelectionTable.H"
29 #include "mathematicalConstants.H"
31 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
36 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
38 defineTypeNameAndDebug(definedHollowConeInjector, 0);
40 addToRunTimeSelectionTable
43 definedHollowConeInjector,
48 // * * * * * * * * * * * * * * * * Constructors * * * * * * * * * * * * * * //
50 // Construct from components
51 definedHollowConeInjector::definedHollowConeInjector
53 const dictionary& dict,
57 injectorModel(dict, sm),
58 definedHollowConeDict_(dict.subDict(typeName + "Coeffs")),
63 definedHollowConeDict_.subDict("dropletPDF"),
67 innerConeAngle_(definedHollowConeDict_.lookup("innerConeAngle")),
68 outerConeAngle_(definedHollowConeDict_.lookup("outerConeAngle"))
71 // convert CA to real time - inner cone angle
72 forAll(innerConeAngle_, i)
74 innerConeAngle_[i][0] = sm.runTime().userTimeToTime(innerConeAngle_[i][0]);
76 // convert CA to real time - outer cone angle
77 forAll(outerConeAngle_, i)
79 outerConeAngle_[i][0] = sm.runTime().userTimeToTime(outerConeAngle_[i][0]);
82 // check number of injectors
83 if (sm.injectors().size() != 1)
85 Info << "Warning!!!\n"
86 << "definedHollowConeInjector::definedHollowConeInjector"
87 << "(const dictionary& dict, spray& sm)\n"
88 << "Same inner/outer cone angle profiles applied to each injector"
92 // check number of entries in innerConeAngle list
93 if (innerConeAngle_.empty())
95 FatalError << "definedHollowConeInjector::definedHollowConeInjector"
96 << "(const dictionary& dict, spray& sm)\n"
97 << "Number of entries in innerConeAngle must be greater than zero"
101 // check number of entries in outerConeAngle list
102 if (outerConeAngle_.empty())
104 FatalError << "definedHollowConeInjector::definedHollowConeInjector"
105 << "(const dictionary& dict, spray& sm)\n"
106 << "Number of entries in outerConeAngle must be greater than zero"
107 << abort(FatalError);
110 scalar referencePressure = sm.p().average().value();
111 // correct pressureProfile
112 forAll(sm.injectors(), i)
114 sm.injectors()[i].properties()->correctProfiles(sm.fuels(), referencePressure);
120 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
122 definedHollowConeInjector::~definedHollowConeInjector()
126 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
128 scalar definedHollowConeInjector::d0
134 // swallow function arguments - not used
135 // return value sampled from PDF
136 return dropletPDF_->sample();
140 vector definedHollowConeInjector::direction
149 const injectorType& it = injectors_[n].properties();
151 // interpolate to find inner and outer angles at time, t
152 scalar angleInner = it.getTableValue(innerConeAngle_, t);
153 scalar angleOuter = it.getTableValue(outerConeAngle_, t);
155 // use random number to generate angle between inner/outer cone angles
156 scalar angle = angleInner + rndGen_.scalar01()*(angleOuter-angleInner);
158 scalar alpha = sin(angle*mathematicalConstant::pi/360.0);
159 scalar dcorr = cos(angle*mathematicalConstant::pi/360.0);
160 scalar beta = 2.0*mathematicalConstant::pi*rndGen_.scalar01();
162 // randomly distributed vector normal to the injection vector
163 vector normal = vector::zero;
167 scalar reduce = 0.01;
168 // correct beta if this is a 2D run
169 // map it onto the 'angleOfWedge'
171 beta *= (1.0-2.0*reduce)*sm_.angleOfWedge()/(2.0*mathematicalConstant::pi);
172 beta += reduce*sm_.angleOfWedge();
175 sm_.axisOfWedge()*cos(beta) +
176 sm_.axisOfWedgeNormal()*sin(beta)
183 injectors_[n].properties()->tan1(hole)*cos(beta) +
184 injectors_[n].properties()->tan2(hole)*sin(beta)
188 // set the direction of injection by adding the normal vector
189 vector dir = dcorr*injectors_[n].properties()->direction(hole, t) + normal;
190 // normailse direction vector
197 scalar definedHollowConeInjector::velocity
203 const injectorType& it = sm_.injectors()[i].properties();
204 if (it.pressureIndependentVelocity())
206 return it.getTableValue(it.velocityProfile(), time);
210 scalar Pref = sm_.ambientPressure();
211 scalar Pinj = it.getTableValue(it.injectionPressureProfile(), time);
212 scalar rho = sm_.fuels().rho(Pinj, it.T(time), it.X());
213 scalar dp = max(0.0, Pinj - Pref);
214 return sqrt(2.0*dp/rho);
218 scalar definedHollowConeInjector::averageVelocity
223 const injectorType& it = sm_.injectors()[i].properties();
224 scalar dt = it.teoi() - it.tsoi();
225 return it.integrateTable(it.velocityProfile())/dt;
228 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
230 } // End namespace Foam
232 // ************************************************************************* //