大学物理 ›› 2021, Vol. 40 ›› Issue (6): 71-.doi: 10.16854 /j.cnki.1000-0712.200520

• 大学生园地 • 上一篇    下一篇

高频驱动条件下法拉第斑图生成的临界参数探究

严涵,王伟,周路群   

  1. 北京大学物理学院,北京100871 
  • 收稿日期:2020-11-27 修回日期:2021-01-08 出版日期:2021-06-20 发布日期:2021-06-23
  • 通讯作者: 周路群,E-mail: zhoulq@ pku.edu.cn
  • 作者简介:严涵( 2000—) ,男,湖南长沙人,北京大学物理学院2018 级本科生.

Research on the critical parameter of Faraday pattern generation under higher-frequency driving

YAN Han,WANG Wei,ZHOU Lu-qun   

  1. School of Physics,Peking University,Beijing 100871,China
  • Received:2020-11-27 Revised:2021-01-08 Online:2021-06-20 Published:2021-06-23

摘要:

本实验研究在高频周期外力驱动下的黄原胶溶液系统中法拉第斑图的生成过程.实验结果表明,斑图生成的临界参

数最大驱动加速度Acc与驱动频率f 成准线性关系.进一步的半定量理论分析表明这一结果可能与粘滞导致的能量耗散以及外

界驱动的能量输入达到平衡有关. 溶液表面最大速率可能是影响斑图生成的关键特征量.

关键词: 法拉第斑图, 高频驱动 临界参数, 准线性关系

Abstract:

 In this experiment,the formation of Faraday pattern in xanthan gum solution driven by high frequency

periodic external force is studied.The experimental results show that the critical parameter of pattern generation,

the maximum driving acceleration,has a quasi linear relationship with the driving frequency.Further semiquantitative

theoretical analysis shows that this result may be related to the balance of the energy dissipation caused

by viscosity and the energy input of the external driving force,and the maximum velocity of solution surface may be

the key characteristic quantity affecting the pattern generation.

Key words: Faraday waves, higher-frequency driving, critical parameter, quasi linear relation