发表机构
Univ. Grenoble Alpes, Grenoble-INP, CNRS, LEGI（格勒诺布尔阿尔卑斯大学，格勒诺布尔国立理工学院，法国国家科学研究中心，格勒诺布尔实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过三维离散元模拟发现，在重力驱动的致密无粘性颗粒流中，增大颗粒间摩擦系数可降低系统整体耗散，揭示了滑动接触概率与能量损失共同调控耗散的微观机制。
AI 中文摘要
利用大规模三维离散元模拟，我们研究了无粘性颗粒在溜槽流中的运动学特性，以及配位数和滑动接触比例的演变。我们的结果表明，在某些条件下，增大颗粒间摩擦系数会导致系统整体耗散的减少。这一发现强调，整体耗散不仅由滑动接触期间损失的能量决定，还受此类接触发生的概率影响，而该概率随着摩擦系数的增大而显著降低。这些效应共同揭示了在致密且无粘性的颗粒材料中，颗粒尺度摩擦相互作用与宏观流动行为之间微妙且非平凡的交织关系。
英文摘要
Using large-scale, three-dimensional discrete element simulations, we investigate the kinematic properties of granular chute flows of cohesionless grains, together with the evolution of the coordination number and the fraction of sliding contacts. Our results reveal that, under certain conditions, increasing the grain--grain friction coefficient leads to a decrease in the global dissipation of the system. This finding highlights that the overall dissipation is not solely governed by the energy lost during sliding contacts, but also by the probability that such contacts occur, a probability that decreases markedly as the friction coefficient increases. Together, these effects demonstrate the subtle and nontrivial interplay between grain-scale frictional interactions and macroscopic flow behavior in dense and cohesionless granular materials.
Journal refMechanics Research Communications, 2026, 157, pp.104799
