Hydrodynamics and Contact Angle Relaxation during Unsteady Spreading

Autor:	Stephen Garoff, and Kroum Stoev, Enrique Rame, Yue Suo
Rok vydání:	2001
Předmět:	Inertial frame of reference Chemistry Flow (psychology) Surfaces and Interfaces Condensed Matter Physics Power law Physics::Fluid Dynamics Momentum diffusion Contact angle Classical mechanics Electrochemistry Meniscus Relaxation (physics) General Materials Science Hydrodynamic theory Spectroscopy
Zdroj:	Langmuir. 17:6988-6994
ISSN:	1520-5827 0743-7463
Popis:	We have studied the unsteady spreading of a liquid on a solid surface by observing the liquid−air meniscus shape and analyzing it with the hydrodynamic theory for Stokes' flow. The unsteady spreading process exhibits both quasi-steady and unsteady regimes. The unsteadiness in our moderately high viscosity system arises from temporal relaxation of the contact angle rather than inertial effects or momentum diffusion. The quasi-steady regime can be accurately described by a model that ascribes a steady-state flow near the contact line. “Spontaneous” spreading, i.e., spreading to final state of zero contact line speed, is recognized as a special case of the general unsteady spreading process with the commonly used power laws for spreading occurring only under special conditions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b6969be1bec82f0c3093b3a3c1445acf https://doi.org/10.1021/la0104572 Zobrazit plný text záznamu