Air-water transient heat transfer in a bubble column

Y. Katz, V. Dubovsky, G. Ziskind, R. Letan

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

2 Scopus citations


This work focuses on a direct contact heat transfer between water and air bubbles. A tube 0.2m in outer diameter and 1.4m high was filled with water. Low-humidity air was continuously dispersed into bubbles at the bottom of the tube. The water inside the tube could be heated initially or continuously during the experimental runs, using controllable electrical strip heaters. Temperature measurements were simultaneously performed at several locations inside the column. The results show that the water temperature was almost uniform due to perfect mixing induced by the bubbles movement. The column of water was not insulated, and the cooling by convection and radiation at the walls was accounted for. The heat-transfer rates between the water and the rising air bubbles were estimated for various modes encountered in the experimental study, and mathematically modeled. The model simulations for the batchwise cooled water compare well with the experimental results.

Original languageEnglish
Title of host publicationProceedings of the 2003 ASME Summer Heat Transfer Conference, Volume 2
PublisherAmerican Society of Mechanical Engineers
Number of pages6
ISBN (Print)0791836940, 9780791836941
StatePublished - 1 Jan 2003
Event2003 ASME Summer Heat Transfer Conference (HT2003) - Las Vegas, NV, United States
Duration: 21 Jul 200323 Jul 2003

Publication series

NameProceedings of the ASME Summer Heat Transfer Conference


Conference2003 ASME Summer Heat Transfer Conference (HT2003)
Country/TerritoryUnited States
CityLas Vegas, NV

ASJC Scopus subject areas

  • Engineering (all)


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