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Journal articles
Evaporation-driven dewetting of a liquid film
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
https://hal-cea.archives-ouvertes.fr/cea-01485388
Contributor : Dominique Girard <>
Submitted on : Wednesday, March 8, 2017 - 4:28:34 PM
Last modification on : Friday, November 6, 2020 - 4:33:47 AM
Long-term archiving on: : Friday, June 9, 2017 - 1:48:34 PM
Contributor : Dominique Girard <>
Submitted on : Wednesday, March 8, 2017 - 4:28:34 PM
Last modification on : Friday, November 6, 2020 - 4:33:47 AM
Long-term archiving on: : Friday, June 9, 2017 - 1:48:34 PM
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PhysRevFluids.1.041901.pdf
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