一种采用快速摄像的高精度落球粘度计
A high precision falling-ball viscometer using a fast camera
摘要：
本文介绍了一种用落球技术和一台廉价的每秒1000帧的定点摄像机测量牛顿流体粘度的简单而廉价的方法。我们成功地测量了甘油和甘油-水混合物的粘度，精度很高。我们使用了三个不同尺寸的铜球，直径为0.8 mm，1.59 mm和2.38 mm，以检查在不同浓度的甘油-水混合溶液中测量粘度的准确性，范围从50%到100%（纯甘油）。我们的测量结果与其他标准技术进行的测量结果非常一致。我们在这篇手稿中提出的简单和廉价的技术和物理可以用来创建一个简单的粘度测量设置学习复杂的流体力学，即使在本科实验室和高中教学实验室。
英文摘要：
This paper describes a simple and inexpensive method of measuring viscosity of a Newtonian fluid using the ball drop technique and an inexpensive point and shoot ~1000 frame per second camera. We successfully measured the viscosity of glycerol and glycerol-water mixture with high precision. We used three different size copper balls of diameters 0.8 mm, 1.59 mm, and 2.38 mm to check the accuracy of the measured viscosity in different concentrations of glycerol-water mixer solutions ranging from 50% to 100% (pure glycerol). Our measurements are in excellent agreement with the measurements conducted by other standard techniques. The simple and inexpensive techniques and physics we present in this manuscript can be employed to create a simple viscosity measurement setup for learning about complex fluid mechanics even at the undergraduate laboratory and high school teaching laboratory.
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