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Old   October 3, 2020, 09:21
Default surface film properties
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Riddhideep Biswas
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Hello everyone!!
I am working on a lagrangian simualtion using sprayFoam and I want to use the surface film utility in order to depict the deposition pattern on a surface, but I am unable to understand the entries used in the surfaceFilmProperties file:

surfaceFilmModel kinematicSingleLayer;

regionName wallFilmRegion;

active true;

kinematicSingleLayerCoeffs
{
filmThermoModel constant;
constantCoeffs
{
specie water;
rho0 1000;
mu0 1e-3;
sigma0 0.07;
}

injectionModels
(
curvatureSeparation
drippingInjection
);

curvatureSeparationCoeffs
{
definedPatchRadii
(
("(cube[0-9][0-9]_side[0-9]_to_cube[0-9][0-9]_side[0-9])" 0)
);
}

drippingInjectionCoeffs
{
cloudName reactingCloud1;
deltaStable 0;

particlesPerParcel 100.0;

parcelDistribution
{
type RosinRammler;
RosinRammlerDistribution
{
minValue 5e-04;
maxValue 0.0012;
d 7.5e-05;
n 0.5;
}
}
}
turbulence laminar;
laminarCoeffs
{
Cf 0.001;
}

forces
(
thermocapillary
distributionContactAngle
);

distributionContactAngleCoeffs
{
Ccf 1;

distribution
{
type normal;
normalDistribution
{
minValue 50;
maxValue 100;
expectation 75;
variance 100;
}
}

zeroForcePatches ();
}
}


What do curvatureSeparation, drippingInjection and forces like thermocapillary and distributionContactAngle mean? Also what do the coefficients Cf and Ccf denote?
Please help me to gain insights in these areas so that I may be able to use suitable models and values of these in my case.
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