椭圆
接触角
下降(电信)
旋转对称性
材料科学
度量(数据仓库)
坐滴法
光学
工作(物理)
曲线拟合
几何学
数学
计算机科学
物理
工程类
复合材料
热力学
机械工程
统计
数据库
作者
A PapakonstantinouC,ChenH,AmirfazliA
出处
期刊:Surface Innovations
日期:2022-11-01
卷期号:10 (6): 387-394
被引量:1
标识
DOI:10.1680/jsuin.21.00028
摘要
In this work, the authors examined the commonly used fitting methods for optical contact angle measurement. It was shown that currently, there is no available fitting method that can measure the contact angle of a non-axisymmetric drop without a clear view of the drop baseline. This work contributes to contact angle measurement methods by providing a new ellipse-fitting method. The new method fits the drop profile with a general equation of an ellipse whose major and minor axes are not necessarily parallel and normal with the substrate, respectively. The advantage of this method is that it can measure the contact angle of a non-axisymmetric drop without a clear view of the drop baseline. The measurement results were validated by comparing against the DropSnake and polynomial fitting methods. Generally good agreement was seen, which is important as it validates this method as the only available method for finding the contact angle of a droplet when the contact line is not visible – for example, in a condensation environment where many drops can block the view of each other’s contact line.
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