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Interfacial Phenomena and Heat Transfer

年間 4 号発行

ISSN 印刷: 2169-2785

ISSN オンライン: 2167-857X

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Indexed in

SIMULTANEOUS IMBIBITION AND EVAPORATION OF LIQUIDS ON GROOVED SUBSTRATES

巻 7, 発行 3, 2019, pp. 239-253
DOI: 10.1615/InterfacPhenomHeatTransfer.2019031166
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要約

Imbibition of volatile liquids on textured surfaces and in porous layers governs heat and mass transport in natural phenomena and in technological applications, including thermal management of electronic devices and ink-jet printing. These processes are responsible for significant improvement of cooling efficiency during drop impact cooling and flow boiling if the surfaces to be cooled are covered by highly porous nanofiber layers. Prediction of imbibition rate in textured substrates and porous layers, especially in the presence of evaporation, is a very complicated task. The existent imbibition theories for porous media rely on the known capillary pressure and the material permeability and are only applicable for the cases where the imbibition front separates a completely saturated region from a completely dry region. The hydrodynamics and transport processes during imbibition on textured surfaces and porous layers are substantially more complicated and are not completely understood. In this work simultaneous imbibition and evaporation in a model textured substrate are described theoretically and numerically. A typical element of the model system is a single groove, along which the liquid flows under the action of capillary pressure gradient. The cross-section area occupied by the liquid varies along the groove. The shape of the liquid-gas interface and the imbibition rate are determined by the groove geometry, the properties of the liquid, the substrate wettability, and the thermal conditions. The predicted maximal imbibed length decreases with increasing of the evaporation rate. This trend agrees with the available experimental results on imbibition into porous layers.

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によって引用された
  1. Kolliopoulos Panayiotis, Kumar Satish, Capillary flow of liquids in open microchannels: overview and recent advances, npj Microgravity, 7, 1, 2021. Crossref

  2. Heinz M., Stephan P., Gambaryan-Roisman T., Influence of nanofiber coating thickness and drop volume on spreading, imbibition, and evaporation, Colloids and Surfaces A: Physicochemical and Engineering Aspects, 631, 2021. Crossref

  3. Ghillani Noemi, Heinz Michael, Gambaryan-Roisman Tatiana, Capillary rise and evaporation of a liquid in a corner between a plane and a cylinder: A model of imbibition into a nanofiber mat coating, The European Physical Journal Special Topics, 229, 10, 2020. Crossref

  4. Kubochkin Nikolai, Gambaryan-Roisman Tatiana, Capillary-driven flow in corner geometries, Current Opinion in Colloid & Interface Science, 59, 2022. Crossref

  5. Kolliopoulos Panayiotis, Jochem Krystopher S., Francis Lorraine F., Kumar Satish, Capillary flow of evaporating liquid solutions in open rectangular microchannels, Journal of Fluid Mechanics, 938, 2022. Crossref

  6. Kubochkin Nikolai, Gambaryan-Roisman Tatiana, Edge wetting: Steady state of rivulets in wedges, Physics of Fluids, 34, 4, 2022. Crossref

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