落球法测量液体粘滞系数的研究与改进  

Study and Improvement on Measuring Liquid Viscosity Coefficient with Falling Balls

作　　者：余森源 唐锐涛 余其旺 卞小贝 王茂香[1] YU Senyuan;TANG Ruitao;YU Qiwang;BIAN Xiaobei;WANG Maoxiang(Center of Experimental Physics,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]南京理工大学物理实验中心,南京210094

出　　处：《实验科学与技术》2024年第2期26-29,共4页Experiment Science and Technology

基　　金：国家自然科学基金青年基金(11204132);国家自然科学基金理论物理专项基金(11047163/A05);中国博士后科学基金面上项目(2014M551543);江苏省博士后科研资助计划(1302013B)。

摘　　要：该文对落球法测量透明液体粘滞系数的实验进行了改进和深入研究。介绍了视频分析法测量液体粘滞系数实验步骤,使用开源软件Kinovea对小球下落过程进行录像追踪,剔除不合格实验过程,对合格实验过程进行逐帧分析。该方法将实验测量精度提高至240帧/S,实验误差减小至少50%。同时深入研究了尺寸效应、边缘效应对实验测量结果的影响。This article improves the measurements of liquid viscosity coefficient with falling ball and gives an intensive study.We briefly introduce the experimental steps for measuring the viscosity coefficient of liquids using video analysis.It employs the open-source software Kinovea to record and track the falling process of a ball,excluding any unqualified experimental procedures and analyzing qualified experiments frame by frame.This method enhances the experimental measurement accuracy to 240 frames per second and reduces experimental error by at least 50%.Moreover we intensively study the effects of size and edge on the experimental results.

关 键 词：液体粘滞系数 落球法 视频分析法 实验误差 

分 类 号：O4-34[理学—物理]