✦ LIBER ✦

Surface-Tension-Driven Flows in a Thin Layer of a Water–n-Heptanol Solution

✍ Scribed by M.A. Azouni; C. Normand; G. Pétré

Publisher: Elsevier Science
Year: 2001
Tongue: English
Weight: 91 KB
Volume: 239
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2001.7568

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✦ Synopsis

A model for Marangoni flows that we observed on plane free surfaces of thin layers of aqueous fatty alcohol solutions is developed by considering evaporation-condensation of alcohol. The velocities of surface-tension-driven flows caused by gradients in temperature and in concentration are evaluated for water-n-heptanol solutions, which have a minimum of the equilibrium surface tension near 40 • C. Theoretical results are discussed on the basis of experimental observations.