A noise-resistant ADSA-PH algorithm for superhydrophobic surface's static contact angle evaluation

作者：Xu, Z. N.^*

来源：AIP Advances, 2017, 7(3): 035210.

DOI：10.1063/1.4974460

The blur around the contact points significantly decreases the evaluated static contact angle for superhydrophobic surface which is clearly presented in the paper. To improve the accuracy in the evaluated static contact angle for superhydrophobic surface, an accurate static contact angle algorithm, namely ADSA-PH (axisymmetric drop shape analysis-profile and height), is proposed. It discards the extracted drop edge points close to the contact points and makes use of the residual points and the drop height to determine the static contact angle. The contact angle errors caused by the blur close to the contact points are significantly reduced. The classical ADSA-P algorithm, the modified selected-plane method and the proposed algorithm are used to evaluate static contact angle. The results validate the proposed algorithm. The accuracy in the evaluated contact angle increases with increasing image resolution. To reduce the error caused by a limitation of image resolution, the minimum allowable image resolutions are presented.

• 出版日期2017-3
• 单位新能源电力系统国家重点实验室; 华北电力大学（保定）; 华北电力大学