1 /*---------------------------------------------------------------------------*\
3 \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
5 \\ / A nd | Copyright (C) 1991-2008 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")),
69 tan1_(sm.injectors().size()),
70 tan2_(sm.injectors().size())
73 // convert CA to real time - inner cone angle
74 forAll(innerConeAngle_, i)
76 innerConeAngle_[i][0] = sm.runTime().userTimeToTime(innerConeAngle_[i][0]);
78 // convert CA to real time - outer cone angle
79 forAll(outerConeAngle_, i)
81 outerConeAngle_[i][0] = sm.runTime().userTimeToTime(outerConeAngle_[i][0]);
84 // check number of injectors
85 if (sm.injectors().size() != 1)
87 Info << "Warning!!!\n"
88 << "definedHollowConeInjector::definedHollowConeInjector"
89 << "(const dictionary& dict, spray& sm)\n"
90 << "Same inner/outer cone angle profiles applied to each injector"
94 // check number of entries in innerConeAngle list
95 if (innerConeAngle_.size() < 1)
97 FatalError << "definedHollowConeInjector::definedHollowConeInjector"
98 << "(const dictionary& dict, spray& sm)\n"
99 << "Number of entries in innerConeAngle must be greater than zero"
100 << abort(FatalError);
103 // check number of entries in outerConeAngle list
104 if (outerConeAngle_.size() < 1)
106 FatalError << "definedHollowConeInjector::definedHollowConeInjector"
107 << "(const dictionary& dict, spray& sm)\n"
108 << "Number of entries in outerConeAngle must be greater than zero"
109 << abort(FatalError);
112 // initialise injectors
113 forAll(sm.injectors(), i)
115 Random rndGen(label(0));
116 vector dir = sm.injectors()[i].properties()->direction();
122 vector testThis = rndGen.vector01();
124 tangent = testThis - (testThis & dir)*dir;
128 tan1_[i] = tangent/magV;
129 tan2_[i] = dir ^ tan1_[i];
132 scalar referencePressure = sm.p().average().value();
133 // correct pressureProfile
134 forAll(sm.injectors(), i)
136 sm.injectors()[i].properties()->correctProfiles(sm.fuels(), referencePressure);
142 // * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
144 definedHollowConeInjector::~definedHollowConeInjector()
148 // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * //
150 scalar definedHollowConeInjector::d0
156 // swallow function arguments - not used
157 // return value sampled from PDF
158 return dropletPDF_->sample();
162 vector definedHollowConeInjector::direction
170 const injectorType& it = injectors_[n].properties();
172 // interpolate to find inner and outer angles at time, t
173 scalar angleInner = it.getTableValue(innerConeAngle_, t);
174 scalar angleOuter = it.getTableValue(outerConeAngle_, t);
176 // use random number to generate angle between inner/outer cone angles
177 scalar angle = angleInner + rndGen_.scalar01()*(angleOuter-angleInner);
179 scalar alpha = sin(angle*mathematicalConstant::pi/360.0);
180 scalar dcorr = cos(angle*mathematicalConstant::pi/360.0);
181 scalar beta = 2.0*mathematicalConstant::pi*rndGen_.scalar01();
183 // randomly distributed vector normal to the injection vector
184 vector normal = vector::zero;
188 scalar reduce = 0.01;
189 // correct beta if this is a 2D run
190 // map it onto the 'angleOfWedge'
192 beta *= (1.0-2.0*reduce)*sm_.angleOfWedge()/(2.0*mathematicalConstant::pi);
193 beta += reduce*sm_.angleOfWedge();
196 sm_.axisOfWedge()*cos(beta) +
197 sm_.axisOfWedgeNormal()*sin(beta)
209 // set the direction of injection by adding the normal vector
210 vector dir = dcorr*injectors_[n].properties()->direction() + normal;
211 // normailse direction vector
218 scalar definedHollowConeInjector::velocity
224 const injectorType& it = sm_.injectors()[i].properties();
225 if (it.pressureIndependentVelocity())
227 return it.getTableValue(it.velocityProfile(), time);
231 scalar Pref = sm_.ambientPressure();
232 scalar Pinj = it.getTableValue(it.injectionPressureProfile(), time);
233 scalar rho = sm_.fuels().rho(Pinj, it.T(time), it.X());
234 scalar dp = max(0.0, Pinj - Pref);
235 return sqrt(2.0*dp/rho);
239 scalar definedHollowConeInjector::averageVelocity
244 const injectorType& it = sm_.injectors()[i].properties();
245 scalar dt = it.teoi() - it.tsoi();
246 return it.integrateTable(it.velocityProfile())/dt;
249 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
251 } // End namespace Foam
253 // ************************************************************************* //