Volume 90, Number 2, April 2010
|Number of page(s)||6|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||06 May 2010|
The role of surface rheology in liquid film formation
School of Engineering and Applied Sciences, Harvard University - Cambridge, MA 02138, USA
2 TIPs - Fluid Physics unit, Université Libre de Bruxelles - C.P. 165/67, 1050 Brussels, Belgium, EU
3 Laboratoire de Physique des Solides UMR8502, Université Paris-Sud - 91405 Orsay, France, EU
4 Institut de Physique de Rennes UMR6251, Université de Rennes - 35042 Rennes, France, EU
5 Department of Mechanical and Aerospace Engineering, Princeton University - Princeton, NJ 08544, USA
Corresponding author: firstname.lastname@example.org
Accepted: 19 April 2010
The role of surface rheology in fundamental fluid dynamical systems, such as liquid coating flows and soap film formation, is poorly understood. We investigate the role of surface viscosity in the classical film-coating problem. We propose a theoretical model that predicts film thickening based on a purely surface-viscous theory. The theory is supported by a set of new experimental data that demonstrates slight thickening even at very high surfactant concentrations for which Marangoni effects are irrelevant. The model and experiments represent a new regime that has not been identified before.
PACS: 47.15.gm – Thin film flows / 47.85.mb – Coating flows / 68.03.-g – Gas-liquid and vacuum-liquid interfaces
© EPLA, 2010
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