CFD Online Discussion Forums - how to inject two different sized particle in icoUncoupledKinematicParcelFoam?

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how to inject two different sized particle in icoUncoupledKinematicParcelFoam?

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;

    }

}

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)

                );

            }

        }

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

Quote:

Originally Posted by ansubru (Post 480888)

Hello ansubru,

Did you figure out the solution?

Thanks and best regards,
Min

Quote:

Originally Posted by czhao86 (Post 412085)

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;

    }

}

Hello Rexxar,

I am wondering whether you have solved your problem.

In addition, could you please be so kind to have a look at my question?

https://www.cfd-online.com/Forums/op...tml#post687195

Thanks and best regards!

Quote:

Originally Posted by Sören Sander (Post 480459)

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)

                );

            }

        }

Hello Sören Sander,

I am wondering whether you could have a look at my question.

https://www.cfd-online.com/Forums/op...tml#post687195

Thanks and best regards,
Min