大学物理 ›› 2017, Vol. 36 ›› Issue (2): 39-42.doi: 10.16854 /j.cnki.1000-0712.2017.02.011

• 编者按 • 上一篇    下一篇

拉脱法测量液体表面张力系数的改进

林仁荣,邱祖强,陈丽敏,谢知   

  1. 福建农林大学机电工程学院,福建福州350002
  • 收稿日期:2015-12-25 修回日期:2016-06-21 出版日期:2017-02-20 发布日期:2017-02-20
  • 作者简介:林仁荣( 1962—) ,男,福建莆田人,福建农林大学机电工程学院副教授,主要从事凝聚态物理研究工作
  • 基金资助:
    福建农林大学教学改革指定性项目( 107 /111414017) 资助

Improvement on measuring coefficient of surface tension by abruption

LIN Ren-rong,QIU Zhu-qiang,CHEN Li-min,XIE Zhi   

  1. College of Mechanical and Electronical Engineering,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China
  • Received:2015-12-25 Revised:2016-06-21 Online:2017-02-20 Published:2017-02-20

摘要: 通过改进原有的实验仪器,设计一个拉脱法测量液体表面张力系数的新实验.从金属环片受力分析开始,推导测量 液体表面张力系数的计算新公式,纠正了一直以来不计液膜重力的过于粗略的计算方法.实践证明该实验测量方法操作方便, 测量过程稳定,重复性强,数据精度高.并对新的实验结果进行准确分析,澄清了有关文献中错误的概念.

关键词: 拉脱法, 表面张力系数, 受力分析, 灵敏度

Abstract: A new method for measuring coefficient of surface tension of liquid is designed by improving equipment of the experiment. New calculation formula is proposed based on force analysis of the metal ring. It corrects the used rough method which ignoring the weight of liquid. This new method has easy operation,and experiment data show that it has high accuracy and good stability. By a careful analysis of the new experimental results, some mistakes in related literatures are corrected.

Key words: pulled off method, surface tension coefficient, force analysis, sensitivity