颗粒棒在更密集的障碍物场中下落更快
Granular Rods Fall Faster in Denser Obstacle Fields
浏览论文内容
中文总结 AI 辅助
该研究通过模拟耗散棒下落过程，发现粒子形状可引发非单调受驱输运，棒在更密集障碍物场中下落更快，相关标度论证解释了三种速度变化状态及被捕获前的平均下落距离。
中文摘要 AI 辅助
粒子形状如何影响外驱下通过障碍物场的输运是非平衡物理学的基础问题。我们模拟了耗散棒在重力作用下穿过随机放置的固定障碍物的下落过程。随着障碍物密度增加，平均下落速度先减小、后增大，再在被捕获前减小，因此棒在更密集的障碍物场中下落更快。基于碰撞率和棒几何的标度论证可解释这三种状态、它们的交叉点及被捕获前的平均下落距离，这些结果揭示了由粒子各向异性引发的非单调受驱输运。
英文摘要
How does particle shape affect driven transport through obstacle fields? We simulate a dissipative rod falling under gravity through randomly placed fixed obstacles. For sufficiently slender rods, the mean descent speed before trapping decreases, increases, and then decreases again as obstacle density rises, opening a window of densities in which rods fall faster in denser fields. Scaling arguments based on collision rates and rod geometry explain the three regimes and their crossovers. Particle shape can thus reverse the expectation that crowding slows driven transport.
发表机构
- The University of Osaka（大阪大学）
机构由 AI 辅助整理，请以论文原文为准。
