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March 24, 2020, 09:25 |
Particle-tracking coupling with other cases.
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#1 |
Member
cal
Join Date: Feb 2020
Location: nowhere
Posts: 65
Rep Power: 6 |
Hi everyone,
Firstly, if this is an unnecessary question sorry for this. I did solve a case with using PISO algorithm similar to pitzDaily file. I did LES simulation now I want to take it to the next level with particle-tracking. You can see what I've done at the attachment. I just want to a few particle goes to the volume of my geometry with inlet (at the bottom) and flow to the outlet (at the top). I looked for a tutorial case like this but I couldn't find anything. Is there a way to couple my case with particle-tracking cases? I am open to any advice (or source). By the way, I'm adding my files and some screenshots in case you want to know. Best regards, Said. |
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March 25, 2020, 07:00 |
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#2 |
Senior Member
Yogesh Bapat
Join Date: Oct 2010
Posts: 102
Rep Power: 16 |
You can use icoUncoupledParcelFoam to solve particles with obtained flow field.
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March 26, 2020, 12:47 |
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#3 |
Member
cal
Join Date: Feb 2020
Location: nowhere
Posts: 65
Rep Power: 6 |
Hi ybapat,
I tried icoUncoupledParcelFoam to ran my own case and it worked just fine. As you see in the attachment I did enter the 11 particle's position with my hands. But I want to the particles to enter the system on their own, without entering their position. How can i do this? And I wonder, is there a way to see where these particles accumulate in the system? Note: I tried with simpleFoam pitzDaily case, not LES. Gif: https://gfycat.com/filthyhardibadanmalimbe Best regards, Said. |
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March 27, 2020, 00:19 |
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#4 |
Senior Member
Yogesh Bapat
Join Date: Oct 2010
Posts: 102
Rep Power: 16 |
You can try different types of injections available.
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March 27, 2020, 12:19 |
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#5 |
Member
cal
Join Date: Feb 2020
Location: nowhere
Posts: 65
Rep Power: 6 |
Hi again ybapat,
I ran the simulation by injection (patchInjection). But there is a problem. After a while, the cycle stops working before completion. Why is this happening? What should I do? 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 kinematicCloudProperties; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // solution { active true; coupled false; transient yes; cellValueSourceCorrection off; maxCo 0.3; interpolationSchemes { rho cell; U cellPoint; mu cell; } integrationSchemes { U Euler; } } constantProperties { rho0 1.2; youngsModulus 6e8; poissonsRatio 0.35; } subModels { particleForces { sphereDrag; gravity; } injectionModels { model1 { type patchInjection; parcelBasisType fixed; patchName inlet; nParticle 1; SOI 0; U0 (20 0 0); parcelsPerSecond 5000; sizeDistribution { type normal; normalDistribution { expectation 650e-6; variance 25e-6; minValue 500e-6; maxValue 800e-6; } } flowRateProfile constant 1; massTotal 0; duration 10; } } dispersionModel none; patchInteractionModel none; surfaceFilmModel none; stochasticCollisionModel none; collisionModel none; pairCollisionCoeffs { maxInteractionDistance 0.0001; 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; upperWall { youngsModulus 1e10; poissonsRatio 0.23; alpha 0.12; b 1.5; mu 0.43; cohesionEnergyDensity 0; } lowerWall { youngsModulus 1e10; poissonsRatio 0.23; alpha 0.12; b 1.5; mu 0.43; cohesionEnergyDensity 0; } frontAndBack { youngsModulus 1e10; poissonsRatio 0.23; alpha 0.12; b 1.5; mu 0.1; cohesionEnergyDensity 0; } }; } } cloudFunctions {} // ************************************************************************* // It looks like this. Code:
Time = 0.29 Evolving kinematicCloud Solving 3-D cloud kinematicCloud Cloud: kinematicCloud injector: model1 Added 5 new parcels Cloud: kinematicCloud Current number of parcels = 1450 Current mass in system = 2.49819e-07 Linear momentum = (1.93968e-07 4.25057e-08 5.0635e-12) |Linear momentum| = 1.98571e-07 Linear kinetic energy = 1.09014e-07 model1: number of parcels added = 1450 mass introduced = 2.49819e-07 Rotational kinetic energy = 0 ExecutionTime = 260.48 s ClockTime = 262 s Time = 0.291 Evolving kinematicCloud Solving 3-D cloud kinematicCloud Cloud: kinematicCloud injector: model1 Added 5 new parcels Cloud: kinematicCloud Current number of parcels = 1455 Current mass in system = 2.50729e-07 Linear momentum = (1.9443e-07 4.27472e-08 1.03438e-12) |Linear momentum| = 1.99073e-07 Linear kinetic energy = 1.09353e-07 model1: number of parcels added = 1455 mass introduced = 2.50729e-07 Rotational kinetic energy = 0 ExecutionTime = 260.49 s ClockTime = 262 s Time = 0.292 Evolving kinematicCloud Solving 3-D cloud kinematicCloud Cloud: kinematicCloud injector: model1 Added 5 new parcels Gifs: https://gfycat.com/revolvingoldfashionedindigobunting https://gfycat.com/poshfarhoatzin |
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March 28, 2020, 10:19 |
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#6 |
Member
cal
Join Date: Feb 2020
Location: nowhere
Posts: 65
Rep Power: 6 |
Hi everyone,
I think i did solve my problem. I just reduced the parcelsPerSecond and increased the duration. Gif: 1) https://gfycat.com/energeticdecisivecurlew 2) https://gfycat.com/admirablemadaruanas Code:
injectionModels { model1 { type patchInjection; parcelBasisType fixed; patchName inlet; nParticle 1; SOI 0; U0 (10 0 0); parcelsPerSecond 1000; sizeDistribution { type normal; normalDistribution { expectation 650e-6; variance 25e-6; minValue 500e-6; maxValue 800e-6; } } flowRateProfile constant 1; massTotal 0; duration 100; } } Said. |
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les, particle tracking, piso, pitzdaily |
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