基于晶格Boltzmann方法的接触角实时测量研究

doi:10.16088/j.issn.1001-6600.2018.01.005

Abstract

Abstract: The contact angle is the basic feature in the surface wetting,capillary phenomena and moving contact lines. Although the numerical calculation is able to effectively simulate the contact angle phenomenon, in the dynamic simulation,the contact angle can not be accurately measured in real time. Based on the chemical potential lattice Boltzmann method, a geometric method is designed to measure the contact angle in real time. Under the condition of neglecting gravity,the calculated results are consistent with the theoretical expectations of the ball crown model and the results are not affected by the droplet size. Under the consideration of gravity conditions,although the droplets show significant deformation, the measured micro-contact angle remains unchanged,consistent with the theoretical expectations. When the substrate is tilted,the advancing angle of the droplet gradually increases and the receding angle decreases gradually . The method can measure the dynamic contact angle hysteresis in real time.

Key words: contact angle, contact angle hysteresis, chemical potential, lattice Boltzmann method

CLC Number:

HUANG Bingfang,WEN Binghai,QIU Wen,ZHAO Wanling,CHEN Yanyan. Research on Real Time Measurement of Contact Angle Based on Lattice Boltzmann Method[J].Journal of Guangxi Normal University(Natural Science Edition), 2018, 36(1): 34-43.

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Research on Real Time Measurement of Contact Angle Based on Lattice Boltzmann Method

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