Dynamic hysteresis of an oscillatory contact line
Abstract
During oscillatory wetting, a phase retardation emerges between contact angle variation and contact line velocity, presenting as a hysteresis loop in their correlation -- an effect we term dynamic hysteresis. This phenomenon is found to be tunable by modifying the surface with different molecular layers. A comparative analysis of dynamic hysteresis, static hysteresis, and contact line friction coefficients across diverse substrates reveals that dynamic hysteresis is not a result of dissipative effects but is instead proportionally linked to the flexibility of the grafted layer on the surface. In the quest for appropriate conditions to model oscillatory contact line motion, we identify the generalized Hocking's linear law and modified Generalized Navier Boundary Condition (GNBC) as alternative options for predicting realistic dynamic hysteresis.
Keywords
Cite
@article{arxiv.2408.05796,
title = {Dynamic hysteresis of an oscillatory contact line},
author = {Jiaxing Shen and Yaerim Lee and Yuanzhe Li and Stéphane Zaleski and Gustav Amberg and Junichiro Shiomi},
journal= {arXiv preprint arXiv:2408.05796},
year = {2024}
}