Acoustothermal Atomization of Water Nanofilms

We report nonequilibrium molecular simulations of the vibration-induced heating of nanoscale-thick water layers on a metal substrate. In addition to experimentally confirmed acoustothermal evaporation, we observe hitherto unmapped nucleate and film boiling regimes, accompanied by the generation of u...

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Bibliographic Details
Published in:Physical review letters 2018-09, Vol.121 (10), p.104502-104502, Article 104502
Main Authors: Pillai, Rohit, Borg, Matthew K, Reese, Jason M
Format: Article
Language:English
Subjects:
Atomizing
Film boiling
Heat flux
Sprayers
Substrates
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Summary:We report nonequilibrium molecular simulations of the vibration-induced heating of nanoscale-thick water layers on a metal substrate. In addition to experimentally confirmed acoustothermal evaporation, we observe hitherto unmapped nucleate and film boiling regimes, accompanied by the generation of unprecedented heat fluxes [∼O(10^{9})  W/m^{2}]. We develop a universal scaling parameter to classify the heat-transfer regimes and to predict the thickness of the residual nonevaporating liquid layer. The results find broad application to systems involving drying, coatings, and sprays.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.121.104502