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Heat Pipe Science and Technology, An International Journal

Publication de 4  numéros par an

ISSN Imprimer: 2151-7975

ISSN En ligne: 2151-7991

OSCILLATING MENISCI AND LIQUID FILMS AT EVAPORATION/CONDENSATION

Volume 5, Numéro 1-4, 2014, pp. 59-67
DOI: 10.1615/HeatPipeScieTech.v5.i1-4.30
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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.

CITÉ PAR
  1. Nikkhah A., Tessier-Poirier A., Karami N., Abouali O., Frechette L.G., Investigation of the Liquid Plug Friction Force in the Self-Oscillating Fluidic Heat Engine (SOFHE), 2019 19th International Conference on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (PowerMEMS), 2019. Crossref

  2. Zhang Xiaolong, Nikolayev Vadim S., Liquid film dynamics with immobile contact line during meniscus oscillation, Journal of Fluid Mechanics, 923, 2021. Crossref

  3. 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

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