Optimal and effective technique for particle packing

Safranyik, Ferenc; Varga, Attila; Oldal, István; Keppler, István

doi:10.1016/j.apt.2020.06.016

Cited by 5 publications

(2 citation statements)

References 24 publications

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“…Recently, various techniques have been proposed to produce dense particle packings such as mechanical vibration, snowstorm filling, etc. [49]. The morphology of dense compacts of non-spherical particles generated using these techniques can be the subject of future research.…”

Section: Packing Structure Analysismentioning

confidence: 99%

Porous Structure of Cylindrical Particle Compacts

et al. 2021

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The porous compacts of non-spherical particles are frequently used in energy storage devices and other advanced applications. In the present work, the microstructures of compacts of monodisperse cylindrical particles are investigated. The cylindrical particles with various aspect ratios are generated using superquadrics, and the discrete element method was adopted to simulate the compacts formed under gravity deposition of randomly oriented particles. The Voronoi tessellation is then used to quantify the porous microstructure of compacts. With one exception, the median reduced free volume of Voronoi cells increases, and the median local packing density decreases for compacts composed of cylinders with a high aspect ratio, indicating a loose packing of long cylinders due to their mechanical interlocking during compaction. The obtained data are needed for further optimization of compact porous microstructure to improve the transport properties of compacts of non-spherical particles.

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Section: Packing Structure Analysismentioning

confidence: 99%

Porous Structure of Cylindrical Particle Compacts

et al. 2021

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“…Hence calibration of micromechanical parameters is a key question in each discrete simulation, properties of sandstone particles were identified by accomplishing silo outflow experiments. Detailed description of the calibration procedure and micromechanical parameters of sandstone can be found in our previous work [14].…”

Section: Dem Modelmentioning

confidence: 99%

Numerical investigation of snowstorm filling

Safranyik

Varga²

2021

EPJ Web Conf.

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During industrial air preparation, one of the most important issues is the proper moisture content. In vehicle brake systems, compressed air is commonly used, where condensate in the system can lead to serious problems as corrosion, frosting, etc. For avoiding malfunctions, the relative humidity of the media must decrease to 20-40%, by adsorbing its moisture content. To achieve this, air dryer units filled with desiccant granular media is commonly used in railway industry. The compressed air flows through the dryer, thus the particles can bind the water vapour. If the packing density of the desiccant can increase, the efficiency of the dryer can improve. In this paper an interesting method for container filling, the snowstorm technique was investigated and optimized by applying discrete element method. Essence of the device is a rod system placed below the filler bin, which ensures even distribution of the particles. By the numerical analysis it was revealed, the particles’ lateral velocity is increased because of the snowstorm system, but with non-optimal arrangement, the particle flow can be significantly blocked. Based on our systematic analysis, optimal geometry of the particle distribution system was found, which ensures settling more particles by 9.5% into the dryer reservoir.

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