An important feature of contact line motion,as an irreversible process,is its dissipative nature,which can dominate the dynamics during the early stages of droplet spreading.A phenomenological contact line friction co...An important feature of contact line motion,as an irreversible process,is its dissipative nature,which can dominate the dynamics during the early stages of droplet spreading.A phenomenological contact line friction coefficient𝜇μf,obtained through direct matching of phase-field simulations and experimental observations,emerges as an effective parameter for quantifying this dissipation.This paper provides a comprehensive overview ofμf,its experimental determination,and its relevance across a variety of surfaces and conditions.We discuss when and whyμf becomes the dominant source of dissipation,and examine how it is modulated by factors such as liquid viscosity,surface chemistry,substrate topography,and external stimuli including electric potential.This review highlights the importance ofμf in bridging molecular-scale processes and macroscopicwetting dynamics,reflecting the intrinsic material response of the three-phase system.展开更多
基金Japan Society for the Promotion of Science,Grant/Award Number:22H04950。
文摘An important feature of contact line motion,as an irreversible process,is its dissipative nature,which can dominate the dynamics during the early stages of droplet spreading.A phenomenological contact line friction coefficient𝜇μf,obtained through direct matching of phase-field simulations and experimental observations,emerges as an effective parameter for quantifying this dissipation.This paper provides a comprehensive overview ofμf,its experimental determination,and its relevance across a variety of surfaces and conditions.We discuss when and whyμf becomes the dominant source of dissipation,and examine how it is modulated by factors such as liquid viscosity,surface chemistry,substrate topography,and external stimuli including electric potential.This review highlights the importance ofμf in bridging molecular-scale processes and macroscopicwetting dynamics,reflecting the intrinsic material response of the three-phase system.
