Evaporation-driven dewetting of a liquid film - Archive ouverte HAL Access content directly
Journal Articles Physical Review Fluids Year : 2016

Evaporation-driven dewetting of a liquid film

(1, 2) , (2) , (2) , (2) , (3)
1
2
3

Abstract

We study the dynamics of evaporating ethanol films deposited by a receding liquid meniscus. The films are surrounded by pure vapor in a capillary heated above the saturation temperature. We observe the substrate dewetting with the dewetting ridge in spite of the complete wetting at equilibrium. The dewetting is caused by a high contact angle (∼30◦) induced by evaporation. The obtained values agree with a theory proposed earlier. The film shape is measured with both grid deflection technique and interferometry. The phenomenon is convenient to observe inside a capillary with an axial thermal gradient. When the capillary is closed at one end and open at another to a constant pressure reservoir, the meniscus oscillations are known to appear spontaneously. Such a system is the simplest version of an industrial device called a pulsating heat pipe. The effect is general and can be used in any system to control the wetting properties
Fichier principal
Vignette du fichier
PhysRevFluids.1.041901.pdf (642.85 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-01485388 , version 1 (08-03-2017)

Identifiers

Cite

L. Fourgeaud, E. Ercolani, J. Duplat, P. Gully, Vadim S. Nikolayev. Evaporation-driven dewetting of a liquid film. Physical Review Fluids, 2016, 1, pp.41901(R). ⟨10.1103/PhysRevFluids.1.041901⟩. ⟨cea-01485388⟩
136 View
313 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More