水中比萨实验装置设计  

The Design of the Pisa Experiment Devices in Fluids

作　　者：刘岩[1] 孙明星[1] 王宇[1] 隋茂鸿[1] 孙芹[1] 

机构地区：[1]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《科教导刊》2013年第10期176-179,共4页The Guide Of Science & Education

摘　　要：为了能够清晰地看见,流体中运动的物体因为粘性而与理想运动状况下大大不同,根据一切流体都具有粘性这一事实,先采用计算机数值模拟方法对小球在流体中运动现象进行分析。建立了基于小球材料和尺寸以及流体物理性质的数值模型,采用制作实验仪器并且观察记录现象的方法进行验证。模拟实验结果表明,在相同流体中,密度相同直径不同的小球运动加速度的不同只来自阻力的影响。实际情况下,为了减小容器中流体流动对小球运动的影响,经过分析,确定了直径为25cm,高度为150cm的有机玻璃筒。经过实际实验操作,实验现象明显,可以得出流体中固体的运动受到流体粘度的影响,为了能够采集数据和进行分析,在容器的基础安装感应器、计时器等,可以得到小球在流体中运动时间进而便于进行研究。In order to clearly see that the moving objects in fluids greatly differ from the objects in the ideal movement due to viscidity and according to the preliminary experiment conditions during the study of viscous fluids, the paper makes an analy- sis of the movement of the globule in fluids with the method of computer numerical simulation based on the fact that all fluids have viscidity. The numerical model based on the material and size of the globule and fluid properties is established and the method of making experiment apparatuses and observing and recording the phenomena is tested. The results of the simulation experiment show that in the same fluid, the different accelerations of the globule with same density and different diameters only come from the influence of the resistance. In actual situations, the experiment is completed in the experiment apparatuses and the fluids in experiment containers can＇t be guaranteed to be completely static. In order to reduce the influences of the movement of fluids in containers on the globule and to consider the influences of fluid pressure and economic factors, we determines the organic glass tube with the diameter of 25 cm and the height of 150 cm through the analysis. Through the practical experiment operation, the phenomenon of the experiment is obvious and the conclusion that the movement of the solids in fluids is influen- ced by fluid viscosity is drawn. In order to collect data and make an analysis, we can install inductors and timers under the base of the container to obtain the movement time of the globule in fluids so as to easily study.

关 键 词：粘性流体 小球 运动 加速度 实验仪器 

分 类 号：O351.1[理学—流体力学]