【摘要】 粘滞系数是反映液体内部粘性力大小的物理量。落球法是测定液体粘滞系数的一种常用方法,然而测量结果有较大的误差。根据流体在水平管中运动的泊肃叶公式,提出测定液体粘滞系数的新方法。设计制造新的实验装置,测定不同温度下蓖麻油的粘滞系数。实验结果表明:该装置可以精确地测定蓖麻油在一定温度范围内的粘滞系数。装置适用于非物理类专业的大学物理实验课程,可面向高校所有理、工、农、林等各专业的学生,同时适用于化学工程相关专业课程。更多还原

【Abstract】 Liquid viscosity coefficient is a physical parameter,which reflects the internal fluid viscous force. Falling ball method is a commonly used method for determination of liquid viscosity coefficient,but measurements have large errors. According to Poiseuille formula for fluid movement in a horizontal pipe,a new method for determination of liquid viscosity coefficient is put forward. A new experiment device is designed to determine the viscous coefficient of castor oil at different temperatures. The results show that the device can accurately determine the viscosity coefficient of castor oil in a certain temperature range. The device can apply to non-professional physics experiment course,and is suitable for all university science,engineering,agriculture,forestry and other majors,it can also apply to chemical engineering-related courses.更多还原