蓖麻油中小球运动的数值模拟与实验研究  

Numerical simulation and experimental study on small ball motion in castor oil

作　　者：周俊尖 桂鑫雨 代如成 王中平[1] 孙晓宇 张增明[1] ZHOU Junjian;GUI Xinyu;DAI Rucheng;WANG Zhongping;SUN Xiaoyu;ZHANG Zengming(School of Physical Science,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学技术大学物理学院,安徽合肥230026

出　　处：《物理实验》2025年第4期47-51,共5页Physics Experimentation

基　　金：中国科学技术大学教育教学改革研究重点项目(No.2024xjyxm031);中国科学技术大学线上课程项目(No.2023xxskc06)。

摘　　要：数值模拟了小球在蓖麻油中下落过程的加速度与速度随时间变化,以及小球周围流场速度的演化情况.在0.05 s之内,小球周围的流场速度迅速增加;由于黏滞力的增大,随后小球周围的流场速度缓慢增加;最后液体的流场逐渐达到平衡状态.利用加速度计研究了小球在蓖麻油中自由下落时的运动情况,获得小球下落过程中加速度与速度的变化,测得10℃时蓖麻油的黏度为2.39 Pa·s.Based on numerical simulation method,the dependence of acceleration and velocity of the ball in castor oil was given,as well the velocity field of the castor oil around the ball was described.Within 0.05 s,there was a rapid increase in the velocity of the fluid near the ball.Then,the velocity increase of the ball became slowly due to the viscous forces exerted by the fluid on the ball.Eventually,the whole flow field gradually reached an equilibrium state.The motion of small ball in castor oil was investigated using accelerometers.By measuring the variations in velocity and acceleration of the ball,the viscosity of castor oil was determined to be 2.39 Pa·s when the ambient temperature was 10℃.

关 键 词：落球法 黏度 加速度计 数值模拟 

分 类 号：O4-33[理学—物理]