Numerical realization and structure characterization on random close packings of cuboid particles with different aspect ratios
Xie Z., An X., Yan S., Li C., Shen Y.
Powder Technology
Vol.344, P. 514-524
Опубликовано: 2019
Тип ресурса: Статья
DOI:10.1016/j.powtec.2018.12.017
Аннотация:
Packing processes of cuboid particles with different aspect ratios (h/b) under 3D vibrations were numerically reproduced by discrete element method using multi-sphere model. The influences of vibration conditions (e.g. vibration time, frequency, and amplitude) and particle shape on the packing densification were comprehensively analyzed. The macro property such as packing density (ρ) and micro properties such as coordinate number (CN), radial distribution function (RDF), contact types and force networks were systematically characterized and compared, and the densification mechanism was discussed. Meanwhile, the randomness of cuboid packing systems was evaluated by nematic order parameter (S 2 ) and cubic order parameter (S 4 ). The results show that dense packings of cuboids with different aspect ratios can be realized by properly controlling vibration conditions. In ρ ~ h/b curve, three peaks can be identified at h/b = 0.5, 1.0 and 1.5, corresponding to the packing densities of 0.700,
Ключевые слова:
Cuboid particles; DEM simulation; Densification; Mechanical vibration; Packing; Structure characterization
Aspect ratio; Densification; Distribution functions; Packing; Vibrations (mechanical); DEM Simulation; Densification mechanisms; Orientational orderings; Radial distribution functions; Random close packings; Structure characterization; Vibration condition; Vibration energies; Vibration analysis; Article; aspect ratio; chemical structure; controlled study; coordinate number; cuboid particle; discrete element method; mathematical analysis; mathematical parameters; molecular interaction; packing density; particle size; physical parameters; radial distribution function; three dimensional imaging; vibration
Язык текста: Английский
ISSN: 1873-328X
Xie Z.
An X.
Yan S. Syaokhun 1984-
Li C.
Shen Y.
Хие З.
Ан Х.
Ян С. Сяохун 1984-
Ли C.
Шен Y.
Numerical realization and structure characterization on random close packings of cuboid particles with different aspect ratios
Текст визуальный непосредственный
Powder Technology
Elsevier Science Publisher B.V.
Vol.344 P. 514-524
2019
Статья
Cuboid particles DEM simulation Densification Mechanical vibration Packing Structure characterization
Aspect ratio Densification Distribution functions Packing Vibrations (mechanical) DEM Simulation Densification mechanisms Orientational orderings Radial distribution functions Random close packings Structure characterization Vibration condition Vibration energies Vibration analysis Article aspect ratio chemical structure controlled study coordinate number cuboid particle discrete element method mathematical analysis mathematical parameters molecular interaction packing density particle size physical parameters radial distribution function three dimensional imaging vibration
Packing processes of cuboid particles with different aspect ratios (h/b) under 3D vibrations were numerically reproduced by discrete element method using multi-sphere model. The influences of vibration conditions (e.g. vibration time, frequency, and amplitude) and particle shape on the packing densification were comprehensively analyzed. The macro property such as packing density (ρ) and micro properties such as coordinate number (CN), radial distribution function (RDF), contact types and force networks were systematically characterized and compared, and the densification mechanism was discussed. Meanwhile, the randomness of cuboid packing systems was evaluated by nematic order parameter (S 2 ) and cubic order parameter (S 4 ). The results show that dense packings of cuboids with different aspect ratios can be realized by properly controlling vibration conditions. In ρ ~ h/b curve, three peaks can be identified at h/b = 0.5, 1.0 and 1.5, corresponding to the packing densities of 0.700,