Assessment of direct image processing methods to measure the apparent contact angle of liquid drops



Biole, D, Wang, M and Bertola, V ORCID: 0000-0001-5357-6191
(2016) Assessment of direct image processing methods to measure the apparent contact angle of liquid drops. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 76. pp. 296-305.

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Abstract

Four methods to measure apparent contact angles of non-axisymmetric drops are analyzed critically. In particular, methods based on local edge interpolation or fitting are compared with direct image processing methods, based on image filtering with a suitable sampling mask. The methods performance is evaluated based on the dynamic contact angle of a dilute polymer solution drop impacting on a solid substrate. Results show that direct image processing methods yield an overall better performance, with a good compromise between measurement accuracy and computational cost, and have a limited dependence on the choice of parameters. Polynomial edge fitting yields the worst performance, both in terms of accuracy and in terms of computational cost.

Item Type: Article
Uncontrolled Keywords: Dynamic contact angle, Digital images, Non-axisymmetric drops
Depositing User: Symplectic Admin
Date Deposited: 08 Jan 2019 15:13
Last Modified: 19 Jan 2023 01:07
DOI: 10.1016/j.expthermflusci.2016.04.006
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3030933

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