From shape to behavior: A synthesis of non-spherical particle dynamics in air--颗粒学报PARTICUOLOGY

Lv, L., & Zhao, B. (2025). From shape to behavior: A synthesis of non-spherical particle dynamics in air. Particuology, 96, 218-243. https://doi.org/10.1016/j.partic.2024.11.005

From shape to behavior: A synthesis of non-spherical particle dynamics in air

Lipeng Lv^a, Bin Zhao^{a b *}

a Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China
b Beijing Key Laboratory of Indoor Air Quality Evaluation and Control, Tsinghua University, Beijing, 100084, China

10.1016/j.partic.2024.11.005

Volume 96, January 2025, Pages 218-243

Received 19 June 2024, Revised 29 September 2024, Accepted 8 November 2024, Available online 29 November 2024, Version of Record 10 December 2024.

E-mail: binzhao@tsinghua.edu.cn

Highlights

• Non-spherical particles constitute a proportion exceeding 80%.

• Summarize the methods describing the shape of non-spherical particles.

• Delineate how to model the motion of non-spherical particles within a fluid.

• Clarify the microscopic particle-fluid interactions and the primary dynamical features.

• Establish a connection between the microscopic processes and macroscopic phenomena.

Abstract

Particles suspended in air are often non-spherical shapes, giving rise to shape-dependent complex dynamical processes. Suspended non-spherical particles are associated with a wide array of engineering and scientific scenarios, embodying both their microscopic and macroscopic dynamical behaviors. A comprehensive understanding of the dynamical behaviors of non-spherical particles in air hinges on the accurate identification and description of particle shape, the development of shape-specific models for the forces and torques acting on these particles, and the subsequent micro- and macroscopic phenomena that emerge as a result. This review surveys the latest advancements in the field of non-spherical particles, spanning from shape identification to the characterization of their dynamical properties. An emphasis is placed on establishing a connection between the micro- and macroscopic dynamical behaviors of non-spherical particles. The shape-induced features encompass periodic rotation and preferential orientation, which result in an oscillating migration path and lead to distinctive macroscopic characteristics. The macroscopic features of non-spherical particles are elucidated based on the preceding analysis of forces, torques, and particle-flow interactions. The future perspectives are also discussed in this review.

Graphical abstract

Keywords

Identification of shaped aerosol; Process safety and human health; Dynamics of non-spherical particles; Shape-induced particle behavior

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