宏观布朗运动在混沌流体界面中
Macroscopic Brownian Motion on a Chaotic Fluid Interface
AI总结:
本研究展示了一种桌面实验,通过振动流体界面观察宏观粒子的布朗运动,揭示了弹道到扩散运动的过渡特性。
摘要:
布朗运动是由于物体所处流体中的碰撞而产生的不规则运动。在本工作中,我们详细描述了一个桌面实验室演示,展示了非阻尼的布朗运动,其中一个宏观粒子 resting 在一个受驱动的流体界面中,在短时间表现出弹道运动,在长时间表现出扩散运动。我们观察了一个毫米级盘子由一个由震动摇器激发的混沌法拉第波场驱动的轨迹。从弹道到扩散运动的过渡发生在通过粒子追踪视频记录的标准手机摄像头可实验性访问的时间和长度尺度上。除了代表性数据外,我们还提供了一个完整的组装指南和操作程序,使学生能够轻松地将该实验应用于课堂。该桌面设置还可以用于其他学生项目和主动研究主题,涉及振动流体界面上的粒子运动。
英文摘要:
Brownian motion is the erratic motion of an object due to collisions with the fluid in which it is immersed. In this work, we detail a tabletop laboratory demonstration of underdamped Brownian motion wherein a macroscopic particle resting on a driven fluid interface exhibits ballistic motion at short times and diffusive motion at long times. We observe the trajectory of a millimetric disk driven by a field of chaotic Faraday waves excited by a shaker. The crossover from ballistic to diffusive motion occurs at time and length scales experimentally accessible through particle tracking of a video recorded with a standard phone camera. Along with representative data, we provide a complete assembly guide, and operating procedure for students so that the experiment can be readily applied in the classroom. The tabletop setup can also be adapted for other student projects and active research topics relating to particle motion on a vibrating fluid interface.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。