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Flow boiling of water in a narrow vertical channel at low mass flux: observations of local phenomena

  • University of Oxford
  • City University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Local phenomena are reported for flow boiling of water in a vertical channel of cross-section 2x 1 mm at a mass flux of 57 kg/m2s. Measurements of pressure, temperature, heat flux and heat transfer coefficient fluctuations and simultaneous video recordings are compared with previous observations at higher mass fluxes. At the lower mass flux, confined bubbles formed and pressure pulses propagated along the channel in much the same way as before but there were changes in the nature of the accompanying fluctuations in wall temperature. Even at low heat flux, upstream fluctuations of a fraction of a degree were amplified to 10 K at the exit from the channel, indicating transient dryout of the wall.

Original languageEnglish
Title of host publicationInternational Heat Transfer Conference 12
PublisherBegell House Inc.
ISBN (Print)9782842993078
DOIs
StatePublished - 2002
Externally publishedYes
Event12th International Heat Transfer Conference, 2002 - Grenoble, France
Duration: 18 Aug 200223 Aug 2002

Publication series

NameInternational Heat Transfer Conference
ISSN (Print)2377-424X

Conference

Conference12th International Heat Transfer Conference, 2002
Country/TerritoryFrance
CityGrenoble
Period18/08/0223/08/02

Keywords

  • flow boiling
  • heat transfer coefficient
  • narrow channel
  • pressure fluctuation
  • temperature fluctuation

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