Prof. ZHAO Jidong’s Technical Review on Computational Models for Granular Particles Published in Nature Reviews Physics

A technical review titled “The Role of Particle Shape in Computational Modelling of Granular Matter” led by Prof. ZHAO Jidong, Professor of the Department of Civil and Environmental Engineering, was published in Nature Reviews Physics, a reviews journal focusing on fundamental and applied physics.

The article was co-authored by Research Assistant Professor Dr. ZHAO Shiwei in the same department and a collaborator from the University of Twente in the Netherlands.

Abstract:
Granular matter is ubiquitous in nature and is present in diverse forms in important engineering, industrial and natural processes. Particle-based computational modelling has become indispensable to understand and predict the complex behavior of granular matter in these processes. The success of modern computational models requires realistic and efficient consideration of particle shape. Realistic particle shapes in naturally occurring and engineered materials offer diverse challenges owing to their multiscale nature in both length and time. Furthermore, the complex interactions with other materials, such as interstitial fluids, are highly nonlinear and commonly involve multiphysics coupling. This Technical Review presents a comprehensive appraisal of state-of-the-art computational models for granular particles of either naturally occurring shapes or engineered geometries. It focuses on particle shape characterization, representation and implementation, as well as its important effects. In addition, the particles may be hard, highly deformable, crushable or phase transformable; they might change their behavior in the presence of interstitial fluids and are sensitive to density, confining stress and flow state. We describe generic methodologies that capture the universal features of granular matter and some unique approaches developed for special but important applications.