探究水在0~10℃粘滞系数的变化规律

Study on the Variation Law of Viscosity Coefficient of Water at 0-10℃

粘滞系数是描述液体内摩擦力性质的一个重要物理量,笔者利用毛细管法和虹吸原理制成一套测量水粘滞系数的实验装置,这套装置利用半导体制冷机与温控器取代恒温箱,实现温度的精准控制。笔者用该装置测量水在0~10℃的粘滞系数,重点探究了4℃附近粘滞系数的变化特点,观察发现,水的粘滞系数在0~10℃范围随温度的升高而逐渐降低,且在4℃左右不存在反常变化。

The viscosity coefficient is an important physical quantity to describe the nature of friction force in liquid.The author has made a set of experimental device to measure the viscosity coefficient of water using capillary method and siphon principle.The device uses semiconductor refrigerator and temperature controller to replace the constant temperature box to realize accurate temperature control.The viscosity coefficient of water at 0-10°C was measured by this device,and the variation characteristics of viscosity coefficient near 4°C were mainly explored.It was observed that the viscosity coefficient of water decreased gradually with the increase of temperature in the range of 0-10°C,and there was no abnormal change at about 4°C.