Unmixing demonstration with a twist: A photochromic Taylor-Couette device
Unmixing demonstration with a twist: A photochromic Taylor-Couette device
复制标题
扭转的分解演示：光致变色泰勒-库埃特装置
DOI：
10.1119/1.4996901
复制
发表时间：
2017
影响因子：
0.9
通讯作者：
K. Sreenivasan
中科院分区：
文献类型：
--
作者：
E. Fonda;K. Sreenivasan
10.1119/1.4996901.1本文描述了著名的Taylor-Couette流动可逆性演示的更新版本。被限制在两个同心圆筒之间的粘性流体被旋转的内筒强迫移动，并通过透明的外筒可视化。旋转几圈后，一个彩色的流体斑点看起来混合得很好。然而，在将运动反转了相同的圈数后，水滴会重新出现在原始位置，就像流体刚刚解开一样。家庭用品的使用使该设备成本低廉，无需特定的技术技能即可轻松制造。该装置可用于流体动力学课程的演示和扩展活动，以讨论粘性、蠕动流动、无惯性和时间可逆性的概念。
10.1119/1.4996901.1This article describes an updated version of the famous Taylor-Couette flow reversibility demonstration. The viscous fluid confined between two concentric cylinders is forced to move by the rotating inner cylinder and visualized through the transparent outer cylinder. After a few rotations, a colored blob of fluid appears well mixed. Yet, after reversing the motion for the same number of turns, the blob reappears in the original location as if the fluid has just been unmixed. The use of household supplies makes the device inexpensive and easy to build without specific technical skills. The device can be used for demonstrations in fluid dynamics courses and outreach activities to discuss the concepts of viscosity, creeping flows, the absence of inertia, and time-reversibility.