DEM Simulation of Particle Behavior in Pan-type Pelletizer Considering the Effect of the Capillary Force

Fujihashi, Daiki; Tsunazawa, Yuki; Tokoro, Chiharu; Sakai, Mikio

doi:10.4164/sptj.51.828

Cited by 6 publications

(2 citation statements)

References 26 publications

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“…The analytical model proposed by Mikami et al (1998) was given as follows:F , and dimensionless distance between particles ( ¼h/R p ), respectively. Through comparisons with experimental results (Willet et al, 2000), we preliminarily confirmed that these two analytical models show high accuracy for predicting the static liquid bridge force, as also pointed out in Fujihashi et al (2014). Table 2 shows calculation conditions.…”

Section: Static Liquid Bridge Force Between Particlessupporting

confidence: 85%

Numerical simulation of particle–particle adhesion by dynamic liquid bridge

Kan

Nakamura

Watano

2015

Chemical Engineering Science

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Section: Static Liquid Bridge Force Between Particlessupporting

confidence: 85%

Numerical simulation of particle–particle adhesion by dynamic liquid bridge

Kan

Nakamura

Watano

2015

Chemical Engineering Science

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“…In this study, the capillary forces are modeled according to Israelachvili [36]. Fujihashi et al [37] reported that the model proposed by Israelachvili is in closer accordance to the experimental data presented by Willet [38] than the model of Rabinovich [35]. This model by Israelachvili was already successfully applied to simulate a mixing process in DEM by Y. Tsunazawa et al [39].…”

Section: Contact Forcementioning

confidence: 71%

CFD-DEM Simulation of a Coating Process in a Fluidized Bed Rotor Granulator

et al. 2020

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Coating of particles is a widely used technique in order to obtain the desired surface modification of the final product, e.g., specific color or taste. Especially in the pharmaceutical industry, rotor granulators are used to produce round, coated pellets. In this work, the coating process in a rotor granulator is investigated numerically using computational fluid dynamics (CFD) coupled with the discrete element method (DEM). The droplets are generated as a second particulate phase in DEM. A liquid bridge model is implemented in the DEM model to take the capillary and viscous forces during the wet contact of the particles into account. A coating model is developed, where the drying of the liquid layer on the particles, as well as the particle growth, is considered. The simulation results of the dry process compared to the simulations with liquid injection show an important influence of the liquid on the particle dynamics. The formation of liquid bridges and the viscous forces in the liquid layer lead to an increase of the average particle velocity and contact time. Changing the injection rate of water has an influence on the contact duration but no significant effect on the particle dynamics. In contrast, the aqueous binder solution has an important influence on the particle movement.

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