标题： 基于等厚干涉测量液体的表面张力系数 显示英文标题

标题： Measurement of surface tension coefficients of liquids based on equal thickness interference

摘要： 表面张力系数是流体力学中的一个关键参数。 测量它的传统方法是确定导致液膜破裂的临界表面张力。 然而，由于表面张力系数对环境因素非常敏感，这种方法存在较大的误差。 在本文中，我们提出了一种基于等厚干涉的新方法，用于研究静态液面形状的数学模型，并通过干涉技术进行测量。 该方法实现了液体表面张力系数的精确测量。 实验结果表明，这种方法具有高精度、低成本和仪器简单的优点。 最大测量误差小于3.1%。 此外，这种方法可以用于测量液-液界面张力，具有良好的应用前景。 显示英文摘要

摘要： The surface tension coefficient is a key parameter in fluid mechanics. The conventional method to measure it is to determine the critical surface tension that causes the rupture of a liquid film. However, this method has a large error because the surface tension coefficient is very sensitive to environmental factors. In this paper, we propose a new method based on equal thickness interference to study the mathematical model of the stationary liquid surface shape and measure it by the interference technique. This method enables the accurate measurement of the liquid surface tension coefficient. The experimental results demonstrate that this method has the advantages of high accuracy, low cost, and simple instrumentation. The maximum measurement error is less than 3.1\%. Moreover, this method can be applied to measure the liquid-liquid interfacial tension, which has a good application prospect.