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coneInjection has been extended to include the functionality of
coneNozzleInjection, and the latter has been removed.
Some parameters have changed names. The "positionAxis" entry from
coneInjection has been removed in preferance of coneNozzleInjection's
single "position" and "direction" entries. This means that only one
injection site is possible per model (dictionary substitutions mean that
only minimal additions are required to add further injection sites with
the same parameters). The name of the velocity magnitude has been
standardised as "Umag" and "innerDiameter" and "outerDiamater" have been
renamed "dInner" and "dOuter" for consistency with the inner and outer
spray angles.
Velocity magnitude and diameters are no longer read when they are not
required.
The randomisation has been altered so that the injections generate a
uniform distribution on an cross section normal to the direction of
injection. Previously there was an unexplained bias towards the
centreline.
An example specification with a full list of parameters is shown below.
injectionModels
{
model1
{
type coneInjection;
// Times
SOI 0;
duration 1;
// Quantities
massTotal 0; // <-- not used with these settings
parcelBasisType fixed;
parcelsPerSecond 1000000;
flowRateProfile constant 1;
nParticle 1;
// Sizes
sizeDistribution
{
type fixedValue;
fixedValueDistribution
{
value 0.0025;
}
}
// Geometry
positions (-0.15 -0.1 0);
directions (1 0 0);
thetaInner 0;
thetaOuter 45;
// - Inject at a point
injectionMethod point;
// - Or, inject over a disc:
/*
injectionMethod disc;
dInner 0;
dOuter 0.05;
*/
// Velocity
// - Inject with constant velocity
flowType constantVelocity;
Umag 1;
// - Or, inject with flow rate and discharge coefficient
// This also requires massTotal, dInner and dOuter
/*
flowType flowRateAndDischarge;
Cd 0.9;
*/
// - Or, inject at a pressure
/*
flowType pressureDrivenVelocity;
Pinj 10e5;
*/
}
model2
{
// The same as model1, but at a different position
$model1;
position (-0.15 0.1 0);
}
}
235 lines
5.4 KiB
C++
235 lines
5.4 KiB
C++
/*--------------------------------*- C++ -*----------------------------------*\
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========= |
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\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
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\\ / O peration | Website: https://openfoam.org
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\\ / A nd | Version: dev
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\\/ M anipulation |
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\*---------------------------------------------------------------------------*/
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FoamFile
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{
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version 2.0;
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format binary;
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class dictionary;
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location "constant";
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object SprayCloudProperties;
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}
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
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solution
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{
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active true;
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coupled true;
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transient yes;
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cellValueSourceCorrection on;
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maxCo 0.3;
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sourceTerms
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{
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schemes
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{
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rho explicit 1;
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U explicit 1;
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Yi explicit 1;
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h explicit 1;
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radiation explicit 1;
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}
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}
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interpolationSchemes
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{
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rho cell;
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U cellPoint;
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thermo:mu cell;
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T cell;
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Cp cell;
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kappa cell;
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p cell;
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}
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integrationSchemes
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{
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U Euler;
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T analytical;
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}
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}
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constantProperties
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{
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T0 320;
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// place holders for rho0 and Cp0
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// - reset from liquid properties using T0
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rho0 1000;
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Cp0 4187;
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constantVolume false;
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}
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subModels
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{
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particleForces
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{
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sphereDrag;
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}
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injectionModels
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{
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model1
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{
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type coneInjection;
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SOI 0;
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massTotal 6.0e-6;
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parcelBasisType mass;
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injectionMethod disc;
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flowType flowRateAndDischarge;
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dInner 0;
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dOuter 1.9e-4;
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duration 1.25e-3;
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position (0 0.0995 0);
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direction (0 -1 0);
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parcelsPerSecond 20000000;
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flowRateProfile table
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(
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(0 0.1272)
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(4.16667e-05 6.1634)
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(8.33333e-05 9.4778)
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(0.000125 9.5806)
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(0.000166667 9.4184)
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(0.000208333 9.0926)
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(0.00025 8.7011)
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(0.000291667 8.2239)
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(0.000333333 8.0401)
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(0.000375 8.8450)
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(0.000416667 8.9174)
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(0.000458333 8.8688)
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(0.0005 8.8882)
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(0.000541667 8.6923)
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(0.000583333 8.0014)
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(0.000625 7.2582)
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(0.000666667 7.2757)
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(0.000708333 6.9680)
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(0.00075 6.7608)
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(0.000791667 6.6502)
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(0.000833333 6.7695)
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(0.000875 5.5774)
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(0.000916667 4.8649)
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(0.000958333 5.0805)
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(0.001 4.9547)
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(0.00104167 4.5613)
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(0.00108333 4.4536)
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(0.001125 5.2651)
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(0.00116667 5.2560)
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(0.00120833 5.1737)
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(0.00125 3.9213)
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(0.001251 0.0000)
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(1000 0.0000)
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);
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Cd constant 0.9;
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thetaInner constant 0.0;
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thetaOuter constant 10.0;
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sizeDistribution
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{
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type RosinRammler;
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RosinRammlerDistribution
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{
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minValue 1e-06;
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maxValue 0.00015;
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d 0.00015;
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n 3;
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}
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}
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}
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}
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dispersionModel none;
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patchInteractionModel standardWallInteraction;
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heatTransferModel RanzMarshall;
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compositionModel singlePhaseMixture;
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phaseChangeModel liquidEvaporationBoil;
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surfaceFilmModel none;
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atomizationModel none;
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breakupModel ReitzDiwakar; // ReitzKHRT;
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stochasticCollisionModel none;
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radiation off;
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standardWallInteractionCoeffs
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{
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type rebound;
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}
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RanzMarshallCoeffs
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{
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BirdCorrection true;
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}
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singlePhaseMixtureCoeffs
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{
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phases
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(
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liquid
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{
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C7H16 1;
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}
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);
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}
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liquidEvaporationBoilCoeffs
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{
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enthalpyTransfer enthalpyDifference;
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activeLiquids ( C7H16 );
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}
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ReitzDiwakarCoeffs
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{
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solveOscillationEq yes;
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Cbag 6;
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Cb 0.785;
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Cstrip 0.5;
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Cs 10;
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}
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/*
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ReitzKHRTCoeffs
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{
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solveOscillationEq yes;
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B0 0.61;
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B1 40;
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Ctau 1;
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CRT 0.1;
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msLimit 0.2;
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WeberLimit 6;
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}
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*/
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TABCoeffs
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{
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y0 0;
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yDot0 0;
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Cmu 10;
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Comega 8;
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WeCrit 12;
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}
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}
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cloudFunctions
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{}
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// ************************************************************************* //
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