Bubble sweeping heat transfer mechanism for low flux boiling on downward-facing inclined surfaces

W. Tong, Terrence W Simon, A. Bar-Cohen

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

The theoretical analysis of nucleate boiling heat transfer from an inclined heated surface facing downward is presented. Mathematical models for latent heat transfer by rising bubbles and sensible heat transfer by removal of the superheated layer are developed under low-heat-flux conditions to explain why the boiling curves for inclined surfaces facing downward shift with the surface orientation angle. It is shown that the bubble departure diameter and wall heat flux at a fixed superheat can be influenced by the surface orientation and by contact angle hysteresis when the heat flux is low. At low heat fluxes, nucleate boiling heat transfer is associated with bubbles sliding along the surface, stripping downstream superheated liquid off the surface.

Original languageEnglish (US)
Pages (from-to)173-178
Number of pages6
JournalAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
Volume104
Issue numberPT2
StatePublished - Dec 1 1988
EventCollected Papers in Heat Transfer 1988 - Chicago, IL, USA
Duration: Nov 27 1988Dec 2 1988

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