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Threshold of Bénard-Marangoni instability in drying liquid films

Chauvet, Fabien and Dehaeck, Sam and Colinet, Pierre Threshold of Bénard-Marangoni instability in drying liquid films. (2012) EPL (Europhysics Letters), 99 (3). 34001-p1-34001-p2. ISSN 0295-5075

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Official URL: http://dx.doi.org/10.1209/0295-5075/99/34001

Abstract

We here show how evaporation/condensation processes lead to efficient heat spreading along a liquid/gas interface, thereby damping thermal fluctuations and hindering thermocapillary flows. This mechanism acts as an effective thermal conductivity of the gas phase, which is shown to diverge when the latter is made of pure vapor. Our simple (fitting-parameter–free) theory nicely agrees with measurements of critical conditions for Bénard-Marangoni instability in drying liquid films. Heat spreading is also shown to strongly affect wavelength selection in the nonlinear regime. In addition to providing a quantitative framework for analyzing transitions between complex evaporation-driven patterns, this also opens new perspectives for better controlling deposition techniques based on drying.

Item Type:Article
Additional Information:Thanks to EDP Sciences editor. The definitive version is available at http://iopscience.iop.org/ The original PDF of the article can be found at EPL (Europhysics Letters) website : http://iopscience.iop.org/journal/0295-5075
HAL Id:hal-01360014
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Université de Toulouse > Université Toulouse - Jean Jaurès - UT2J (FRANCE)
Other partners > Université Libre de Bruxelles - ULB (BELGIUM)
Laboratory name:
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Deposited By: Fabien CHAUVET
Deposited On:31 Aug 2016 13:57

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