110th anniversary

continuum modeling of granular mixing in a rotating drum

Qijun Zheng, Liang Bai, Liuyimei Yang, Aibing Yu

Research output: Contribution to journalConference articleOther

Abstract

The mixing of granular materials is notoriously difficult to predict partly due to the complicated mixing mechanisms of particles and their variable flow kinematics. Despite many theoretical studies in idealized configurations of chute and rolling-mode drum, a generic macroscopic model for granular mixing has not been achieved. This paper proposes a continuum model for simulating the mixing of monodisperse particles by combining the μ(I) rheological theory and the convection-diffusion transport equation. The model, implemented via an operator-split scheme, is completely temporal-spatial and able to deal with both continuous flows and transient avalanches. Equipped with a rate-dependent diffusivity, it well recovers the particle concentration at different stages of mixing in slowly rotating drum. Moreover, having been used to simulate granular flow under different conditions, the proposed continuum model may have the potential as a general model to describe particle mixing in different processes.

Original languageEnglish
Pages (from-to)19251-19262
Number of pages12
JournalIndustrial and Engineering Chemistry Research
Volume58
Issue number41
DOIs
Publication statusPublished - 16 Oct 2019

Cite this

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title = "110th anniversary: continuum modeling of granular mixing in a rotating drum",
abstract = "The mixing of granular materials is notoriously difficult to predict partly due to the complicated mixing mechanisms of particles and their variable flow kinematics. Despite many theoretical studies in idealized configurations of chute and rolling-mode drum, a generic macroscopic model for granular mixing has not been achieved. This paper proposes a continuum model for simulating the mixing of monodisperse particles by combining the μ(I) rheological theory and the convection-diffusion transport equation. The model, implemented via an operator-split scheme, is completely temporal-spatial and able to deal with both continuous flows and transient avalanches. Equipped with a rate-dependent diffusivity, it well recovers the particle concentration at different stages of mixing in slowly rotating drum. Moreover, having been used to simulate granular flow under different conditions, the proposed continuum model may have the potential as a general model to describe particle mixing in different processes.",
author = "Qijun Zheng and Liang Bai and Liuyimei Yang and Aibing Yu",
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110th anniversary : continuum modeling of granular mixing in a rotating drum. / Zheng, Qijun; Bai, Liang; Yang, Liuyimei; Yu, Aibing.

In: Industrial and Engineering Chemistry Research, Vol. 58, No. 41, 16.10.2019, p. 19251-19262.

Research output: Contribution to journalConference articleOther

TY - JOUR

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T2 - continuum modeling of granular mixing in a rotating drum

AU - Zheng, Qijun

AU - Bai, Liang

AU - Yang, Liuyimei

AU - Yu, Aibing

PY - 2019/10/16

Y1 - 2019/10/16

N2 - The mixing of granular materials is notoriously difficult to predict partly due to the complicated mixing mechanisms of particles and their variable flow kinematics. Despite many theoretical studies in idealized configurations of chute and rolling-mode drum, a generic macroscopic model for granular mixing has not been achieved. This paper proposes a continuum model for simulating the mixing of monodisperse particles by combining the μ(I) rheological theory and the convection-diffusion transport equation. The model, implemented via an operator-split scheme, is completely temporal-spatial and able to deal with both continuous flows and transient avalanches. Equipped with a rate-dependent diffusivity, it well recovers the particle concentration at different stages of mixing in slowly rotating drum. Moreover, having been used to simulate granular flow under different conditions, the proposed continuum model may have the potential as a general model to describe particle mixing in different processes.

AB - The mixing of granular materials is notoriously difficult to predict partly due to the complicated mixing mechanisms of particles and their variable flow kinematics. Despite many theoretical studies in idealized configurations of chute and rolling-mode drum, a generic macroscopic model for granular mixing has not been achieved. This paper proposes a continuum model for simulating the mixing of monodisperse particles by combining the μ(I) rheological theory and the convection-diffusion transport equation. The model, implemented via an operator-split scheme, is completely temporal-spatial and able to deal with both continuous flows and transient avalanches. Equipped with a rate-dependent diffusivity, it well recovers the particle concentration at different stages of mixing in slowly rotating drum. Moreover, having been used to simulate granular flow under different conditions, the proposed continuum model may have the potential as a general model to describe particle mixing in different processes.

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