Radial mixing and segregation of granular bed bi-dispersed both in particle size and density within horizontal rotating drum

Chen, Hui; Zhao, Xian; Xiao, Youping; Liu, Yilun; Liu, Ying

doi:10.1016/s1003-6326(16)64110-9

Cited by 26 publications

(13 citation statements)

References 23 publications

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“…When particles of different volume or density are being mixed, they tend to segregate . In this work, both types of particle had the same density but their volume ratio ( σ ) was 8.…”

Section: Resultsmentioning

confidence: 99%

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Discrete Element Method Simulation and Experimental Validation of Pattern Development in a Rotating Drum Mixer

et al. 2018

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The handling and processing of powders and granular materials can be crucial for the quality of a final product. Therefore, a detailed description and analysis of granular flow phenomena from first principles is very valuable. In the present study, simulations of granular mixing and segregation of binary‐sized mixtures using a discrete element method were performed for horizontal rotating drum mixers. Numerical results were compared with experimental measurements and significant agreement between both approaches was found. The development of specific flow patterns was observed. The formation of these complex spatiotemporal patterns is influenced by the size of the mixer, the aspect ratio of length to diameter, the rotational speed of the drum, and the initial distribution of the particles.

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“…When particles of different volume or density are being mixed, they tend to segregate . In this work, both types of particle had the same density but their volume ratio ( σ ) was 8.…”

Section: Resultsmentioning

confidence: 99%

“…In this work, both types of particle had the same density but their volume ratio ( σ ) was 8. In accordance with Chen et al , the percolation of particles causes smaller particles to be moved towards the core of the particle bed as observed in both simulations and experiments (Fig. ).…”

Section: Resultsmentioning

confidence: 99%

Discrete Element Method Simulation and Experimental Validation of Pattern Development in a Rotating Drum Mixer

et al. 2018

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“…). Normal overlap between contacting particles is described as

true α_{normalij} = R_{normali} + R_{normalj} - | r_{i} - r_{j} |

…”

Section: Modeling and Validationmentioning

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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“…Deste modo, uma distinção nas propriedades das partículas granulares pode resultar uma mistura inadequada, com consequências prejudiciais para a qualidade do produto final. A importância prática e o elevado grau de complexidade na dinâmica de partículas tornaram a mistura de materiais granulares um tema de intensa pesquisa nas últimas décadas (CHEN et al, 2016;PIRKER et al, 2010). Uma quantidade considerável de trabalhos experimentais sobre a segregação de partículas em tambores rotativos tem sido realizada nas últimas décadas (HE et al, 2007).…”

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“…Esse núcleo é cercado por uma periferia de partículas maiores, fenômeno que se estende por toda a direção axial do tambor (CHEN et al, 2016 Avaliando a influência da razão entre diâmetros de partículas, Kuo et al (2005) relataram a presença de um valor mínimo no índice de segregação, fenômeno observado para uma razão de diâmetros de 2,5. Os autores atribuíram a redução do coeficiente de segregação às forças eletrostáticas.…”

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Estudo da segregação de material granular em tambor rotatório empregando a abordagem numérica Lagrangeana

Brandao¹

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Radial mixing and segregation of granular bed bi-dispersed both in particle size and density within horizontal rotating drum

Cited by 26 publications

References 23 publications

Discrete Element Method Simulation and Experimental Validation of Pattern Development in a Rotating Drum Mixer

Discrete Element Method Simulation and Experimental Validation of Pattern Development in a Rotating Drum Mixer

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

Estudo da segregação de material granular em tambor rotatório empregando a abordagem numérica Lagrangeana

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