Effects of surface tension and inclined surface wettability on sliding bubble heat transfer

Jonghyun Kim, Joon Sang Lee

Research output: Contribution to journalArticle

Abstract

To explore the effects of wettability and surface tension on heat transfer in sliding bubble dynamics, we investigated the manner in which the dynamics of bubble sliding and heat transfer over a heated surface depend on the degree of wettability and the surface tension. Using the volume-of-fluid (VOF) method, the interface of the dispersed phase was tracked in terms of the local volume fraction. The obtained simulation results were consistent with those obtained from experimental studies. Although the heat transfer obtained when bubbles slid freely across the surface were strongly correlated with the skin-friction coefficient, deformability rather than skin friction dominated the heat transfer of bubbles adhering to the surface. The heat transfer rate increased with bubble deformability.

Original languageEnglish
Pages (from-to)77-88
Number of pages12
JournalInternational Journal of Thermal Sciences
Volume142
DOIs
Publication statusPublished - 2019 Aug 1

Fingerprint

wettability
Surface tension
Wetting
sliding
interfacial tension
bubbles
heat transfer
Heat transfer
skin friction
Skin friction
Formability
coefficient of friction
Volume fraction
Fluids
fluids
simulation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Engineering(all)

Cite this

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abstract = "To explore the effects of wettability and surface tension on heat transfer in sliding bubble dynamics, we investigated the manner in which the dynamics of bubble sliding and heat transfer over a heated surface depend on the degree of wettability and the surface tension. Using the volume-of-fluid (VOF) method, the interface of the dispersed phase was tracked in terms of the local volume fraction. The obtained simulation results were consistent with those obtained from experimental studies. Although the heat transfer obtained when bubbles slid freely across the surface were strongly correlated with the skin-friction coefficient, deformability rather than skin friction dominated the heat transfer of bubbles adhering to the surface. The heat transfer rate increased with bubble deformability.",
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Effects of surface tension and inclined surface wettability on sliding bubble heat transfer. / Kim, Jonghyun; Lee, Joon Sang.

In: International Journal of Thermal Sciences, Vol. 142, 01.08.2019, p. 77-88.

Research output: Contribution to journalArticle

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