Transient dynamics of prolate particle–wall collisions in gas–solid flows: A hybrid analytical–numerical framework

Que Q, Hu R, Cui Y, Liu Y, Steinmann P, Sommerfeld M (2026)

Publication Type: Journal article

Publication year: 2026

Journal

International Journal of Multiphase Flow Elsevier

Book Volume: 200

Article Number: 105746

DOI: 10.1016/j.ijmultiphaseflow.2026.105746

Abstract

Resolving the dynamics of non-spherical particles is pivotal for the fidelity of Euler–Lagrange simulations in gas–solid flows, yet conventional models are often constrained by spherical assumptions that fail to capture shape-induced rotational coupling. This study establishes a novel hybrid analytical–numerical closure model for prolate ellipsoidal particle–wall collisions within the inertial-elastic regime. By augmenting Hertzian contact theory with a shape-orientation correction factor explicitly calibrated via high-fidelity Finite Element Method (FEM), we derive explicit analytical expressions that reproduce transient contact mechanics, achieving computational acceleration by several orders of magnitude compared to full-scale numerical solvers. The model uncovers unique transport mechanisms, most notably the anomalous tangential restitution coefficient et>1, driven by the conversion of frictional torque into translational kinetic energy during the collision process. Validated against rigorous numerical benchmarks and reference models, this framework eliminates the cumulative trajectory errors typical of simplified models, offering a robust and efficient sub-grid component for industrial-scale CFD-DEM applications such as pneumatic conveying and inhalation therapy.

Authors with CRIS profile

Paul Steinmann Lehrstuhl für Technische Mechanik (LTM)

Involved external institutions

Huazhong University of Science & Technology CN China (CN) Otto-von-Guericke-Universität Magdeburg DE Germany (DE)

How to cite

APA:

Que, Q., Hu, R., Cui, Y., Liu, Y., Steinmann, P., & Sommerfeld, M. (2026). Transient dynamics of prolate particle–wall collisions in gas–solid flows: A hybrid analytical–numerical framework. International Journal of Multiphase Flow, 200. https://doi.org/10.1016/j.ijmultiphaseflow.2026.105746

MLA:

Que, Qian, et al. "Transient dynamics of prolate particle–wall collisions in gas–solid flows: A hybrid analytical–numerical framework." International Journal of Multiphase Flow 200 (2026).

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