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| Taiebat, Mahdi; Mutabaruka, Patrick; Pellenq, Roland; Radjai, Farhang. |
| We use molecular dynamics simulations of frictionless spherical particles to investigate a class of polydisperse granular materials in which the particle size distribution is uniform in particle volumes. The particles are assembled in a box by uniaxial compaction under the action of a constant stress. Due to the absence of friction and the nature of size distribution, the generated packings have the highest packing fraction at a given size span, defined as the ratio á of the largest size to the smallest size. We find that, up to á = 5, the packing fraction is a nearly linear function of á. While the coordination number is nearly constant due to the isostatic nature of the packings, we show that the connectivity of the particles evolves with á. In... |
| Tipo: Text |
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| Ano: 2017 |
URL: https://archimer.ifremer.fr/doc/00685/79692/82472.pdf |
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| Vo, Thanh Trung; Nezamabadi, Saeid; Mutabaruka, Patrick; Delenne, Jean-yves; Izard, Edouard; Pellenq, Roland; Radjai, Farhang. |
| In order to get insight into the wet agglomeration process, we numerically investigate the growth of a single granule inside a dense flow of an initially homogeneous distribution of wet and dry particles. The simulations are performed by means of the discrete element method and the binding liquid is assumed to be transported by the wet particles, which interact via capillary and viscous force laws. The granule size is found to be an exponential function of time, reflecting the conservation of the amount of liquid and the decrease of the number of available wet particles inside the flow during agglomeration. We analyze this behavior in terms of the accretion and erosion rates of wet particles for a range of different values of material parameters such as... |
| Tipo: Text |
Palavras-chave: Flowing Matter; Granular Materials. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00685/79689/82470.pdf |
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