Prediction of conductive heating time scales of particles in a rotary drum

Emady, Heather; Anderson, Kellie; Borghard, William G.; Muzzio, Fernando J.; Glasser, Benjamin J.; Cuitiño, Alberto M.

doi:10.1016/j.ces.2016.05.022

Cited by 49 publications

(16 citation statements)

References 30 publications

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“…For the purpose of this study, default modeling option in EDEM, the Hertz-Mindlin contact model [7] was used. In this model, the particle-particle mechanical interaction involves the normal impact force and the tangential friction force.…”

Section: Mechanical Dem Modelingmentioning

confidence: 99%

“…More recently, several authors have independently investigated the effect of operating conditions on mixing and heating rates of rotated monodispersed granular material. Figueroa et al [3] have studied various tumbler filling levels and cross-sectional shapes; Chaudhuri et al [4] various revolution speeds, material types and baffles number and shapes; Gui et al [5] and Komossa et al [6] different revolutions speeds; Emady et al [7] different revolution speeds and material thermal conductivities. However, to our best knowledge, no results were published to date concerning dispersed beds composed of particles of different sizes and materials.…”

Section: Introductionmentioning

confidence: 99%

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Mechanical and thermal segregation of milli-beads during contact heating in a rotary drum. DEM modeling and simulation.

Mesnier

Rouabah

Cogné

et al. 2018

Proceedings of 21th International Drying Symposium

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The flow mechanics and heat transfer phenomena within a bed of milli-metric size spherical beads rotated and heated by contact in a horizontal drum were simulated by means of commercial discrete element software EDEM. Mono-dispersed and bi-dispersed beds (two particle sizes or two particle densities) were considered. The mechanical segregation index (standard deviation of local bed compositions) and the thermal segregation index (standard deviation of beads temperatures) were calculated for the different types of bed and same operating conditions. The thermal segregation was found to be enhanced by mechanical segregation and was much stronger for bi-dispersed beds than for monodispersed one. Keywords: rotating drum; particulate solid; segregation; contact heat transfer; DEM simulation.

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Section: Mechanical Dem Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical and thermal segregation of milli-beads during contact heating in a rotary drum. DEM modeling and simulation.

Mesnier

Rouabah

Cogné

et al. 2018

Proceedings of 21th International Drying Symposium

View full text Add to dashboard Cite

show abstract

“…Accurately capturing the particle size distribution is crucial to processes involving denser granular flows and jammed granular packings [35,36]. More importantly, the capability to handle polydisperse systems easily is often available in other open-source and commercial DEM software (e.g., LIGGGHTS [37] and EDEM [38]), and also in other particle-based simulation techniques, such as event-driven molecular dynamics [39,40] and Monte Carlo simulations [41].…”

Section: Department Of Energymentioning

confidence: 99%

Enhancing the physical modeling capability of open-source MFIX-DEM software for handling particle size polydispersity: Implementation and validation

et al. 2017

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Multiphase flows are ubiquitous in many industrial processes. The inherent coupling of different phases poses many unique challenges in predicting and effectively controlling these processes. Hence, computational modeling and simulation offers a viable approach to overcome these challenges. In this study, we present recent development efforts for enhancing the physical modeling capabilities of an open-source computational modeling tool for real life industrial multiphase processes by enabling particle-size polydispersity and demonstrating with an associated validation study. The proposed implementation was performed in MFIX open-source framework due to its unique feature of tightly integrated computational fluid dynamics and discrete element method solvers for simulating coupled continuum fluid and granular flows. We have implemented the polydispersity feature in a minimally invasive way and provided means to allow easy specification of an arbitrary particle size distribution function, which also * Authors contribute equally to this work.

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“…Emady et al. modeled three heating time scales from the rotary drum wall to the solid bed and then proposed an equivalent method for shortening the time of simulation. Nevertheless, there are few articles on the relationship between mixing and heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Mixing and Heat Transfer of Granular Materials in an Externally Heated Rotary Kiln

et al. 2019

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A heat transfer model based on the discrete element software EDEM and the secondary development tool C++ is developed to simulate the mixing and heat transfer process of particles under different parameters. This model is validated by comparison with experimental data and proved reasonable. It aims to study the heat transfer law of flowing particles in an externally heated rotary kiln and reveal the correlation between mixing and heat transfer from the mechanism. The results show that the combination of the total contact area between adherent particles and the drum wall, the mean temperature difference between adherent particles and the drum wall, the total contact area between particles, and the mean temperature difference between particles affect the heat transfer process. Changes in the temperature differences caused by the mixing rate dominate the heat transfer at different speeds or filling rates.

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Prediction of conductive heating time scales of particles in a rotary drum

Cited by 49 publications

References 30 publications

Mechanical and thermal segregation of milli-beads during contact heating in a rotary drum. DEM modeling and simulation.

Mechanical and thermal segregation of milli-beads during contact heating in a rotary drum. DEM modeling and simulation.

Enhancing the physical modeling capability of open-source MFIX-DEM software for handling particle size polydispersity: Implementation and validation

Mixing and Heat Transfer of Granular Materials in an Externally Heated Rotary Kiln

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