落球法测定液体粘滞系数的实验修正探讨  

Discussion on Experimental Correction of Measuring Liquid Viscosity Coefficient by Falling Ball Method

作　　者：罗钧洋 韦帅兵 李晨浩 陈余行 LUO Junyang;WEI Shuaibing;LI Chenhao;CHEN Yuhang(School of Mathematics and Statistics,Shanghai University of Engineering and Science,Shanghai,201620 China)

机构地区：[1]上海工程技术大学数理与统计学院,上海201620

出　　处：《科技创新导报》2021年第29期190-192,共3页Science and Technology Innovation Herald

摘　　要：利用落球法来测量出不同直径金属小球在蓖麻油中匀速运动一段距离所需的时间及速度,从而计算出蓖麻油的粘滞系数,并通过测定的粘滞系数计算得到雷诺数Re,进而对蓖麻油的粘滞系数分别进行一级修正和二级修正,并将修正结果进行分析比较,找到最适合实验教学的数据改进处理方法,并进一步分析探讨了雷诺数与小球直径的关系。Falling ball method is used to measure the time and speed required for small metal balls with different diameters to move at a uniform speed for a certain distance in castor oil,so as to calculate the viscosity coefficient of castor oil,calculate the Reynolds number re through the measured viscosity coefficient.The Reynolds number Re is calculated through the measured viscosity coefficient,and then the viscosity coefficient of castor oil is corrected at the first level and the second level respectively.The correction results are analyzed and compared to find the most suitable data improvement processing method for experimental teaching,and the relationship between Reynolds number and small ball diameter is further analyzed and discussed.

关 键 词：落球法 蓖麻油 雷诺数 修正 粘滞系数 

分 类 号：O21[理学—概率论与数理统计]