摘要
针对在漏斗中吹入气流,使漏斗口附近乒乓球被拾起、限制在漏斗内运动的现象,结合流体相似律和Buckingham Pi定理(量纲分析原理),分析了气体流量、漏斗半顶角、导管半径等主要因素的影响,并构造相关无量纲量进行描述.探究了乒乓球静止时的受力和运动的时间-位置关系,通过COMSOL Multiphysics数值模拟对实验现象进行了分析,并用伯努利效应进行了理论解释,从而从实用的、唯象的角度给出了不同因素对该现象的影响情况.
With the help of the similarity law of fluid and the Buckingham Pi theory(dimensional analysis),the phenomenon of ball picked up by funnel was reproduced,the influence of main factors(the initial flux,the half top angle of the funnel and the radius of the pipe)were determined,and the dimensionless variables were constructed.New methods were applied in the experiments to explore and measure the force on the suspended ball,and to analyze the relation between movement and time when the ball was moving.The COMSOL Multiphysics was used to do numerical simulation,and the phenomenons were analyzed and explained based on the Bernoulli effect.Practical and phenomenological results were given on how the factors influence the phenomenon.
作者
许英特
王心华
李可意
赵瑞丰
XU Ying-te;WNAG Xin-hua;LI Ke-yi;ZHAO Rui-feng(Cuiying Honors College,Lanzhou University,Lanzhou 730000,China;National Demonstration Center for Experimental Physics Education,Lanzhou University,Lanzhou 730000,China)
出处
《物理实验》
2021年第1期38-44,49,共8页
Physics Experimentation
基金
甘肃省高等教育教学成果培育项目
兰州大学示范课程建设项目(No.2019067)。
