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how to inject two different sized particle in icoUncoupledKinematicParcelFoam?

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Old   March 6, 2013, 16:36
Default how to inject two different sized particle in icoUncoupledKinematicParcelFoam?
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Rexxar
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Location: Bethlehem, PA
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As shown in the title, how to inject two different sized particle in icoUncoupledKinematicParcelFoam?

The original particle injection is as follows:

Code:
subModels
{
    particleForces
    {
        sphereDrag;
        gravity;
    }

    injectionModel manualInjection;

    dispersionModel none;

    patchInteractionModel standardWallInteraction;

    heatTransferModel none;

    surfaceFilmModel none;

    collisionModel pairCollision;

    radiation off;

    manualInjectionCoeffs
    {
        massTotal       0;
        parcelBasisType fixed;
        nParticle       1;
        SOI             0;
        positionsFile   "kinematicCloud0Positions";
        U0              (0 0 0);
        sizeDistribution
        {
            type        fixedValue;
            fixedValueDistribution
            {
                value   0.1;
            }
        }
    }

pairCollisionCoeffs
    {
        // Maximum possible particle diameter expected at any time
        maxInteractionDistance  0.1;

        writeReferredParticleCloud no;

        pairModel pairSpringSliderDashpot;

        pairSpringSliderDashpotCoeffs
        {
            useEquivalentSize   no;
            alpha               0.12;
            b                   1.5;
            mu                  0.52;
            cohesionEnergyDensity 0;
            collisionResolutionSteps 12;
        };

        wallModel    wallLocalSpringSliderDashpot;

        wallLocalSpringSliderDashpotCoeffs
        {
            useEquivalentSize no;
            collisionResolutionSteps 12;
            walls
            {
                youngsModulus   1e10;
                poissonsRatio   0.23;
                alpha           0.12;
                b               1.5;
                mu              0.43;
        cohesionEnergyDensity 0;
            }
        };
    }

    standardWallInteractionCoeffs
    {
        //type            stick;
        type            rebound;
    }
}
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Rexxar
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Old   March 17, 2014, 09:18
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Sören Sander
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Hi czhao86,

the following code generates a Particle size distribution:

Code:
	sizeDistribution
	{
	    type        general;
	    generalDistribution
	    {
		distribution
		(
		( 10e-06      0.0025)
		( 20e-06      0.0528)
		( 30e-06      0.2795)
		( 40e-06      1.0918)
		( 50e-06      2.3988)
		( 60e-06      4.4227)
		( 70e-06      6.3888)
		( 80e-06      8.6721)
		( 90e-06      10.3153)
		(100e-06      11.6259)
		(110e-06      12.0030)
		(120e-06      10.4175)
		(130e-06      10.8427)
		(140e-06      8.0016)
		(150e-06      6.1333)
		(160e-06      3.8827)
		(170e-06      3.4688)
		);
	    }
	}
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Old   March 19, 2014, 11:41
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Ananda Kannan
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Hey guys!!

I am also trying to inject particles of different sizes, I however just want to use a random particle injection of only two specified sizes. Can this be done with general distribution?? If so could you share a representative distribution of two sizes 1 and 5 mm ??

Best regards

ansubru
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