倾泻流体研究及数值模拟  

The Analysis of Spilling Water and Its Digital Simulation

作　　者：于光远[1] 宋楠[1] 杨雄[1] 潘永华[1] 高惠滨[1] 

机构地区：[1]南京大学物理学院,江苏南京210093

出　　处：《实验室研究与探索》2014年第2期49-53,共5页Research and Exploration In Laboratory

摘　　要：分析小股水流在自然倾泻时产生的类似"波节"和"麻花"现象,通过大量重复实验还原现象,采用力学分析建模和计算机模拟相结合的方式得出现象的成因。采用流体的连续性方程,结合适当的边界条件,导出了水在光滑圆筒内的速率分布,并指出了"波长"与流量之间的函数关系。改进实验装置,制造出不对称的速率分布从而导致水柱的旋转,并且分析了速率分布不均匀性与旋转方向的关系。最后通过模拟,提高了理论的可信度。We analyzed the phenomenon which is similar to ＂node＂ and ＂serratula＂ generated by natural pouring water, restored the phenomenon through a large number of repeated experiment and figure out the causes of the phenomenon with the combination of mechanical analytic modeling and computer simulation. This paper, by using the fluid continuity equation, combined with the appropriate boundary conditions, obtained the exports rate distribution of water in the smooth cylinder, and pointed out that the functional relationship between the node and quantity of flow. We manufactured asymmetric rate distribution to produce rotation of the water column. Finally, through simulation, we improved the credibility of the theory.

关 键 词：倾泻流体 水“波节” 水“麻花” 流速分布公式 计算机模拟 

分 类 号：O35[理学—流体力学]