Modeling the Dynamics of Fabric in a Rotating Horizontal Drum Using the Discrete Element Method

Park, J.; Wassgren, Carl

doi:10.1080/02726350307491

Cited by 28 publications

(28 citation statements)

References 19 publications

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“…The precise Froude number and fill level at which these various behaviors occur also depend upon the friction coefficient between the bed and the particles. Other factors such as the stiffness and coefficient of restitution of the particle contacts and the particle density do not play a significant role for typical tablet coating conditions (Ketterhagen et al, 2005;Acharya, 2000;Cleary, 2001, Park andWassgren, 2003). Most tablet coaters operate in the rolling, cascading, or cataracting regimes in order to balance efficient mixing with minimal tablet attrition.…”

Section: Introductionmentioning

confidence: 99%

Inter-tablet coating variability: Residence times in a horizontal pan coater

Kalbag

Wassgren

Penumetcha

et al. 2008

Chemical Engineering Science

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Section: Introductionmentioning

confidence: 99%

Inter-tablet coating variability: Residence times in a horizontal pan coater

Kalbag

Wassgren

Penumetcha

et al. 2008

Chemical Engineering Science

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“…To estimate parts detachment and board breakage indirectly, collision energy at each collision between a particle and another particle, or a wall was calculated. Various models are available to calculate collision energy 14,[16][17][18] . In this study, the collision energy was de ned as…”

Section: (4) Collision Energymentioning

confidence: 99%

Investigation of Part Detachment Process from Printed Circuit Boards for Effective Recycling Using Particle-Based Simulation

et al. 2016

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For the establishment of appropriate recycling process, the delamination of electric components from printed circuit boards (PCBs), which are major components of e-waste, is expected, because some of useful critical metals are concentrated in speci c components. However, the knowledge about the mechanism of the delamination process in a drum typed agitation mill is still limited and uncertain. To better comprehend the mechanism, in this study, the particle-based simulation and comminution tests using handmade PCBs were conducted. The behavior of PCBs and the air ow in the mill having exible chains was simulated by the discrete element method (DEM) coupled with computational uid dynamics (CFD). To model the shape of PCBs, the particle based rigid body model was introduced into the DEM. Since this model could not directly simulate the breakage phenomena, collision energy was calculated to qualitatively evaluate the comminution performance. In addition, the simulation results were compared with the experimental comminution tests. This study demonstrated the behavior of PCBs and the air ow in the mill, and the effect of the air to comminution process in the mill. It was also shown that the collision energy related to parts collision was better correlated with the experimental results and this correlation can be assumed using rst order rate equation, which suggested part detachment was mainly brought by direct collision to parts in the mill.

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“…They showed an increase in the angle of repose for nonspherical particles in rotating cylinders. Park (2003) used the same approach as Walton and Braun, but allowed the clusters to deform as they interacted. Cleary and Sawley (2002) simulated 2-D hopper flow with particles modeled as superquadrics with various aspect ratios and angularities.…”

Section: Particle Shapementioning

confidence: 99%