摘要
落球法测液体粘滞系数是理工科高校的一个基本物理实验。环境温度对液体的密度和粘度有很大影响,所以温度在该实验中是一个重要的参数。该文从理论上对不同温度下不同直径的小球在测量区间内匀速下落的时间、收尾速度和匀速下落起点位置进行了计算,并给出了这些参量随着温度变化的规律。实践表明,这为实验者选择合适的实验参数、判断实验数据准确性提供了依据,从而减少了误差。
Falling ball method,which measures the viscosity coefficient of liquid,is a basic physical experiment of science and engineering university. Environmental temperature has a significant effect on the fluid density and viscosity. Thus,the temperature is an important parameter in this experiment. In this paper,the falling time in the measuring interval,the terminal falling velocity and the starting position of uniform falling are theoretically calculated under different temperatures and diameters which were given. The results show the law of these parameters varied with the temperature. It provides the basis for the experimenter to select the appropriate experimental parameters,which can reduce the error.
出处
《实验科学与技术》
2017年第5期20-23,共4页
Experiment Science and Technology
基金
陕西师范大学实验教学改革研究项目(16SY16)
陕西师范大学勤助科研创新基金项目(KY2015YB49)
关键词
落球法
温度
理论计算
粘滞系数
falling ball method
temperature
theoretical simulation
viscosity coefficient
