Publication de 4 numéros par an
ISSN Imprimer: 2151-7975
ISSN En ligne: 2151-7991
OSCILLATING MENISCI AND LIQUID FILMS AT EVAPORATION/CONDENSATION
RÉSUMÉ
To understand the functioning of the pulsating heat pipe (PHP), a liquid film formed by a unique oscillating meniscus is studied under evaporation or condensation conditions within a 2D numerical approach based on the lubrication approximation. The transient heat and mass transfer problem coupled with hydrodynamics is solved within a Taylor bubble hydrodynamics problem. A simple expression for the film thickness time evolution is obtained as a function of the meniscus velocity among other parameters. The time evolution of the meniscus shape is calculated. Based on it, the heat and mass exchange at the gas-liquid interface is evaluated. The contributions of both flat film and curved portion of the gas-liquid interface to the overall heat transfer are analyzed. A criterion defining whether the film is flat or wedge-like, is proposed.
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Zhang Xiaolong, Nikolayev Vadim S., Liquid film dynamics with immobile contact line during meniscus oscillation, Journal of Fluid Mechanics, 923, 2021. Crossref
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Nikolayev Vadim S., Physical principles and state-of-the-art of modeling of the pulsating heat pipe: A review, Applied Thermal Engineering, 195, 2021. Crossref