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Dynamics of wetting: from inertial spreading to viscous imbibition.

Authors
  • Courbin, L1
  • Bird, J C
  • Reyssat, M
  • Stone, H A
  • 1 School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. IPR, UMR CNRS 6251, Campus Beaulieu, Université Rennes 1, 35042 Rennes, France. , (France)
Type
Published Article
Journal
Journal of Physics Condensed Matter
Publisher
IOP Publishing
Publication Date
Nov 18, 2009
Volume
21
Issue
46
Pages
464127–464127
Identifiers
DOI: 10.1088/0953-8984/21/46/464127
PMID: 21715891
Source
Medline
Language
English
License
Unknown

Abstract

We report the influence of the nature of boundaries on the dynamics of wetting. We review some work recently published and highlight new experimental observations. Our paper begins with the spreading of drops on substrates and demonstrates how the exponents of the spreading laws are affected either by the surface chemistry or by the droplet shape. We then discuss the imbibition of completely and partially wetting fluids into channels and over microtextured surfaces. Starting with the one-dimensional imbibition of completely wetting liquids in tubes and surface textures, we show that (i) shape variations of channels change the power-law response of the imbibition and (ii) the geometrical parameters of a surface roughness change the spreading behavior. For partially wetting fluids, we observe directionally dependent spreading: polygonal wetted domains can be obtained. We conclude with a tabular summary of our findings, allowing us to draw connections between the different systems investigated, and shed light on open questions that remain to be addressed.

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