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Confined Bubble and Heat Transfer during Flow Boiling In a High Aspect Ratio Mini-Channel

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Original languageEnglish
Title of host publicationDIFFUSION IN SOLIDS AND LIQUIDS VI, PTS 1 AND 2
EditorsA Ochsner, GE Murch, JMP Delgado
Place of PublicationSTAFA-ZURICH
PublisherTRANS TECH PUBLICATIONS LTD
Pages548-553
Number of pages6
ISBN (Print)*****************
DOIs
Publication statusPublished - 2011
Event6th International Conference on Diffusion in Solids and Liquids - Paris
Duration: 5 Jul 20107 Jul 2010

Conference

Conference6th International Conference on Diffusion in Solids and Liquids
CityParis
Period5/07/107/07/10

Abstract

Single vapour bubble growth and heat transfer mechanism during flow boiling in a rectangular horizontal mini-channel were experimentally investigated. The hydraulic diameter of the channel was 1454 pm, with an aspect ratio (W-in/d(in)) of 10. Degassed FC-72 was used as the working liquid. In this paper, bubble equivalent radius was found to increase linearly till a critical time, beyond which the growth turned into exponential. Bubble growth rate increases with increasing heat flux. Heat transfer mechanisms of the bubble growth at different heat fluxes and mass fluxes were discussed. in addition, the relation between thermal and flow conditions with bubble temporal geometry was explored.

    Research areas

  • Bubble dynamics, Heat transfer, Flow boiling, Confinement

Event

ID: 1363051