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November 14, 2018 09:28 |
Mass loading - InjectionModel DPMFoam
Dear all.
I have a question related to mass flow rate for injection of particles, using DPMsolver. I aim to have a mass flow rate of 1,58*10^(-5) kg/s.
This is my strategy:
Number of particles = 10 000
Volume = (3/4)*pi*(d/2)^3 where d = 70*10^(-6) m
Particle density = 8800 kg/m^3
Duration of simulation 1s.
Mass loading = N_particles*Volume*Density/ Time_simulation = 1,58*10^(-5) kg/s
Can someone verify my code is correct?
See attached code for kinematicCloudProperties.
Code:
/*--------------------------------*- C++ -*----------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Version: 6
\\/ M anipulation |
\*---------------------------------------------------------------------------*/
FoamFile
{
version 2.0;
format ascii;
class dictionary;
location "constant";
object particleProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
solution
{
active true;
coupled true;
transient yes;
cellValueSourceCorrection on; // org: off
interpolationSchemes
{
rho.air cell;
U.air cellPoint;
mu.air cell;
}
integrationSchemes
{
U Euler;
}
sourceTerms
{
schemes
{
U semiImplicit 1;
}
}
}
constantProperties
{
parcelTypeId 1;
rhoMin 1e-15;
minParcelMass 1e-15;
rho0 8800;
youngsModulus 117e6;
poissonsRatio 0.355;
constantVolume false;
alphaMax 0.99;
}
subModels
{
particleForces
{
sphereDrag//WenYuDrag
{
alphac alpha.air;
}
gravity;
}
//////
injectionModels
{
model1
{
type patchInjection;
patchName inlet;
duration 1;
parcelsPerSecond 10000;
massTotal 0;
parcelBasisType fixed;
flowRateProfile constant 1;
nParticle 1;
SOI 0.0;
U0 (9.39 0 0);
sizeDistribution
{
type fixedValue;
fixedValueDistribution
{
value 0.00007;
}
}
}
}
/////
dispersionModel none;
patchInteractionModel localInteraction;
localInteractionCoeffs
{
patches
(
inlet
{
type escape;
e 0.97;
mu 0.09;
}
upperWall
{
type rebound;
e 0.97;
mu 0.09;
}
lowerWall
{
type rebound;
e 0.97;
mu 0.09;
}
outlet
{
type escape;
e 0.97;
mu 0.09;
}
frontAndBack
{
type rebound;
e 0.97;
mu 0.09;
}
);
}
StandardWallInteractionCoeffs
{
type rebound;
e 0.97;
mu 0.09;
}
heatTransferModel none;
surfaceFilmModel none;
collisionModel none;//pairCollision;
pairCollisionCoeffs
{
maxInteractionDistance 0.0025;
writeReferredParticleCloud no;
pairModel pairSpringSliderDashpot;
pairSpringSliderDashpotCoeffs
{
useEquivalentSize no;
alpha 0.02;
b 1.5;
mu 0.10;
cohesionEnergyDensity 0;
collisionResolutionSteps 12;
};
wallModel wallSpringSliderDashpot;
wallSpringSliderDashpotCoeffs
{
useEquivalentSize no;
collisionResolutionSteps 12;
youngsModulus 1e8;
poissonsRatio 0.23;
alpha 0.01;
b 1.5;
mu 0.09;
cohesionEnergyDensity 0;
};
U U.air;
}
stochasticCollisionModel none;
radiation off;
}
cloudFunctions
{}
// ************************************************************************* //
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