Single Particle Dynamics in Granular Systems

Dear Colleagues,

Single particle dynamics in granular systems investigates the motion, interactions, and energy exchanges of individual grains within larger particulate assemblies. Unlike classical fluids or solids, granular media display hybrid behaviours, and comprehending single-particle trajectories and collision processes is crucial for explaining macroscopic phenomena such as jamming, segregation, and wave propagation. This Special Issue welcomes original research that integrates theoretical modelling, computational simulations, and numerical experiments to elucidate mechanisms governing grain-scale dynamics. Topics include particle hopping, rolling, sliding, and diffusive transport under varied conditions of confinement, vibration, shear, and flow. Studies addressing the influence of particle shape, size distribution, surface roughness, and interstitial fluids are particularly encouraged. Authors may employ discrete element methods, high-speed imaging, to quantify force networks, velocity distributions, and energy dissipation pathways. We aim to bridge the gap between grain-level physics and continuum descriptions, enhancing predictive capabilities for industrial processes, geophysical flows, and manufacturing. By highlighting fundamental insights into single-particle behaviour, this collection aspires to advance the understanding and control of granular materials across scientific and engineering domains. These insights inform industrial applications.

Authors are encouraged to share supplementary materials, including data sets, models, simulations, or design frameworks that may aid replication or further exploration by the research community. Contributions with practical implications, cross-disciplinary perspectives, and real-world case studies are especially welcome.

We look forward to your contributions and to collectively advancing the technologies that will shape a more sustainable and energy-efficient world.

Dr. Vivek Garg
Prof. Dr. Jan Nečas
Guest Editors

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• single-particle dynamics
• granular materials
• discrete element modelling
• energy dissipation
• collision processes
• continuum descriptions
• particle transport