Qijun Zheng
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View article: Cohesive particles arch in eccentric silos
Cohesive particles arch in eccentric silos Open
This study investigates the flow behavior of non-cohesive and cohesive particles in eccentric silos using the Eulerian finite element method. The numerical model was rigorously validated against established experimental data. The effects o…
View article: A scalable extraction column utilizing discrete liquid films for lithium recovery from salt lake brines
A scalable extraction column utilizing discrete liquid films for lithium recovery from salt lake brines Open
Liquid-film-based liquid-liquid extraction enhances mass transfer compared to droplet-based extraction (Chang et al., Ind Eng Chem Res, 62 (2023), 17297-17305). This new technique forms discrete liquid films by directing the dispersed phas…
View article: Yielding and Rheology of vibrated beam-driven granular matter: Hysteresis and Memory
Yielding and Rheology of vibrated beam-driven granular matter: Hysteresis and Memory Open
Dense granular matter has attracted significant attention due to its intricate yielding and rheological phenomena. However, unlike sheared or shaken granular systems where energy is injected at the boundaries, the yielding transition induc…
View article: CFD simulation of a cement precalciner with agglomerate-based drag modeling
CFD simulation of a cement precalciner with agglomerate-based drag modeling Open
Cement raw meal particles are typical Geldart Group C particles. Due to strong van der Waals forces, the particles are cohesive, tending to form agglomerates. These agglomerates significantly influence the flow, dispersion, heat transfer a…
View article: Interparticle forces and their effects in particulate systems
Interparticle forces and their effects in particulate systems Open
Particulate materials exhibit rich dynamic behaviour and have been studied extensively in the recent decades. Underpinning this behaviour are the interactions between particles, such as the contact forces and the long-range non-contact for…
View article: A unified theory for granular matter
A unified theory for granular matter Open
Developing a unified theory to describe granular matter, which can behave like either solid or fluid, is one of the grand challenges in modern science. This is mainly because the current theories, rooted in different origins, interpret gra…
View article: A micro-macro constitutive relationship for the pressure of solid phase in dense fluid-particle flows in hopper
A micro-macro constitutive relationship for the pressure of solid phase in dense fluid-particle flows in hopper Open
Continuum modelling of fluid-particle multiphase flows is often challenging when the solid phase becomes dense. In this work, a micro-macro approach combining the microscale discrete element method and the averaging method is used to explo…
View article: Bio-inspired rotary flight of light-driven nanocomposite films
Bio-inspired rotary flight of light-driven nanocomposite films Open
Light-driven photoactuators are promising in a wide range of applications. However, it is still challenging to apply them in flying devices owing to their slow response, small deflection/force and low frequency response. Herein, inspired b…
View article: A continuum model for the segregation of bidisperse particles in a blade mixer
A continuum model for the segregation of bidisperse particles in a blade mixer Open
The process of blending powders using stirring blades involves complicated granular flows, particle‐scale mechanisms, and blade–particle interactions, which is challenging to predict and control. This article proposes a continuum‐based mod…