拉脱速度对测量水表面张力系数影响的研究  

Study on the Influence of Pull-off Velocity on Water Surface Tension Coefficient

作　　者：崔钧晟 吴秀梅 CUI Juncheng;WU Xiumei(School of Physics,Southeast University,Nanjing 211198,China;Chien-Shiung Wu College,Souheast University,Nanjing 211198,China)

机构地区：[1]东南大学物理学院,江苏南京211198 [2]东南大学吴健雄学院,江苏南京211198

出　　处：《大学物理实验》2023年第6期11-15,共5页Physical Experiment of College

基　　金：2020年中央校教学改革专项基金(5207022103A)。

摘　　要：本文研究了拉脱速度对测量水表面张力系数精度的影响。实验结果表明:拉脱速度越大,实验测得水的表面张力系数越小,实验误差越大;而相对缓慢的拉脱速度,有利于提高实验的测量精度。同时在理论上,采用COMSOL模拟的方式对水膜拉脱前后的形态进行了详细分析。并讨论了不同拉脱速度与水膜形态变化的关联,从而对实验结果作出了合理的解释。本文为精确测量水的表面张力系数,提供了拉脱速度对其影响的实验依据。It studies the effect of pull-off velocity on the accuracy of water surface tension coefficient measurement.The result shows that the measured surface tension coefficient of water will be smaller when a larger pull-off velocity is applied.It leads to greater experimental error.The relatively slow pull-off speed is conducive to improving the measurement accuracy of the experiment.At the same time,COMSOL simulation method is used to analyze the morphology of water film before and after pull-off.It is discussed of the relationship between different pull-off speed and the morphology of water film.And then,a reasonable explanation is given to the experimental results.It provides an experimental basis for accurately measuring the surface tension coefficient of water.

关 键 词：张力系数 水膜形态 COMSOL 

分 类 号：O4-34[理学—物理]