基于晶格Boltzmann方法研究曲面上接触角的测量算法

doi:10.16088/j.issn.1001-6600.2020090601

Abstract

Abstract: Contact angle is an important characteristic quantity to measure the wetting of liquid on solid surface. Although many methods can be used to simulate the contact angle phenomenon and measure the contact angle, there is still no simple method for measuring the contact angle on a curved surface. Based on the chemical potential lattice Boltzmann method, this paper proposes a method to measure the contact angle of droplets on curved surfaces. A series of chemical potentials are set for the curved substrate to calculate the contact angle of a fixed drop on the curved surface to observe the wettability under different chemical potentials. Under the ideal condition without considering the gravity, compared with the calculation result of the spherical cap method, the contact angle obtained by the new method has a maximum error of about 3 degrees, which is in good agreement. When the influence of gravity is considered, the droplet of different sizes undergo different deformation, and the spherical cap method is no longer applicable, but the contact angle obtained by the model in this paper is basically unchanged, which is consistent with the theoretical expectation that the microscopic contact angle and gravity are independent.

Key words: contact angle measurement, curved surface, lattice Boltzmann method, chemical potential, wettability

CLC Number:

O647.11

SHAO Yufu, JI Tingting, YAO Yichen, WEN Binghai. Research on Measurement Algorithm of Contact Angle on Curved Surface Based on Lattice Boltzmann Method[J].Journal of Guangxi Normal University(Natural Science Edition), 2021, 39(6): 44-53.

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Research on Measurement Algorithm of Contact Angle on Curved Surface Based on Lattice Boltzmann Method

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