Simulation of the packing of cohesive particles

Yang, Runyu; Zou, Ruiping; Dong, Kun; An, Xizhong; Yu, Aibing

doi:10.1016/j.cpc.2007.02.043

Cited by 40 publications

(30 citation statements)

References 21 publications

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“…This is lower than the 56-54 vol.% expected for a random loose packing of cohesionless monodisperse spheres (defined as the loosest, mechanically stable packing state; Onoda and Liniger 1990;Ciamarra and Coniglio 2008;Zamponi 2008;Farrell et al 2010), and lower still than random loose packings achieved for 7 Page 20 of 25 polydisperse particles (Epstein and Young 1962;Jerram et al 2003). However, the efficiency of random loose packing depends on particle cohesion: for strongly cohesive particles, a stable distribution can be achieved at volume fractions <55% (Dong et al 2006;Yang et al 2007), and the presence of highly non-spherical, loose clustered chains of olivine will reduce this still further Jerram et al 2003). Random loose packing is also dependent on the viscosity of the liquid, with more open packings expected for particles in a viscous liquid (Delaney et al 2011).…”

Section: Formation Of the Fining-upwards Sequencementioning

confidence: 69%

Crystal settling and convection in the Shiant Isles Main Sill

Holness

Farr

Neufeld

2017

Contrib Mineral Petrol

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clusters of olivine are present at the roof, forming a foreshortened mirror image of the coarsening-upwards component of the floor accumulation. The coarsening-upwards sequence records the growth of olivine crystals while in suspension in a convecting magma, and their aggregation into clusters, followed by settling over a prolonged period (with limited trapping at the roof). As olivine was progressively lost from the convecting magma, crystal accumulation on the (contemporaneous) floor of the PCU was increasingly dominated by plagioclase, most likely forming clusters and aggregates with augite and olivine, both of which form large poikilitic grains in the crinanite. While the PCU is unusual in being underlain by an earlier, still hot, intrusion that would have enhanced any driving force for convection, we conclude from comparison with microstructures in other sills that convection is likely in tabular bodies >100 m thickness.

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Section: Formation Of the Fining-upwards Sequencementioning

confidence: 69%

Crystal settling and convection in the Shiant Isles Main Sill

Holness

Farr

Neufeld

2017

Contrib Mineral Petrol

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“…Therefore the force ratio is better than the Bond number in characterizing the piling behavior, as it includes the information of the local structure. The force ratio can be related to the porosity for the packing of cohesive particles as found in the previous studies [12,13]. Here, such a relationship still holds for the porosity of a pile, as shown in Fig.…”

Section: Force Characterizationmentioning

confidence: 63%

“…For a granular system consisting of cohesive particles, normally the Bond number, which is the cohesive force between two particles to the weight of a particle, is used to characterize the effect of the cohesion on the properties on the system, such as the packing density, maximum angle of stability and flow rate [6,8,15]. However, it is found in the packing of cohesive particles, using the sum of the cohesive forces on a particle to its effective gravity is more appropriate [12,13]. In this work, the cohesive force is the capillary force, and then such a force ratio can be defined as:…”

Section: Force Characterizationmentioning

confidence: 99%

“…The description of the model and the calculation of the contact forces between particles can be found in details elsewhere [12,13]. The capillary force results from the pendular liquid bridge formed between two adjacent particles, and can be calculated by solving the Laplace-Young equation.…”

Section: Model Descriptionmentioning

confidence: 99%

“…DEM has been successfully used in the studies of structures, forces and their relationships in the packing of cohesive particles [12,13], although it has not been examined if these findings can be applied to sandpiles.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of cohesive force on the formation of a sandpile

Dong

Zou

Chu

et al. 2013

AIP Conference Proceedings

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Towards the end of drying of granular materials: enhanced evaporation and drying-induced collapse

Wang

Maillet

Pereira

et al. 2021

Preprint

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We experimentally study the drying of loosely packed wet glass beads at low initial water content. The drying rate is found to decrease at the start, corresponding to the decreasing rate period controlled by vapor diffusion, followed by a deviation in drying rate from the diffusion limited evaporation. The propagation of drying front associated with a sharp saturation gradient is identified through both image analysis and magnetic resonance imaging technique. The drying-induced collapse of granular medium is observed and quantified. The concentrated collapse at the end of drying suggests the existence of liquid in the form of liquid bridges in the apparent dry region until the end of drying process. Collapse event is found to be local, i.e., a clear boundary can be identified for each collapse event, below which the loosely packed medium remains intact. This indicates the existence of a saturation gradient in the apparent dry region. The drying dynamics and collapse statistics suggest that the observed transition of drying regimes is due to Kelvin effect. This work demonstrates for the first time the drying enhancement phenomenon due to Kelvin effect even for grains with size of hundreds of micrometers, and provides insights on the drying process of partially saturated granular materials, especially near the final period of evaporation.

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Simulation of the packing of cohesive particles

Cited by 40 publications

References 21 publications

Crystal settling and convection in the Shiant Isles Main Sill

Crystal settling and convection in the Shiant Isles Main Sill

Effect of cohesive force on the formation of a sandpile

Towards the end of drying of granular materials: enhanced evaporation and drying-induced collapse

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