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Multiphase Science and Technology
SJR: 0.124 SNIP: 0.222 CiteScore™: 0.26

ISSN Druckformat: 0276-1459
ISSN Online: 1943-6181

Multiphase Science and Technology

DOI: 10.1615/MultScienTechn.v12.i3-4.40
17 pages

SINGLE BUBBLE HEAT TRANSFER IN SATURATED POOL BOILING OF FC-72

Nagaraja Yaddanapudi
University of Maryland, Department of Mechanical Engineering College Park, MD 20742, USA
Jungho Kim
Department of Mechanical Engineering, University of Maryland, College Park, Maryland, USA

ABSTRAKT

A study of single bubbles growing on a microscale heater array kept at nominally constant temperature was performed. The heater array consisted of 96 heaters each nominally 0.27 mm × 0.27 mm in size. The heater temperatures were kept constant using electronic feedback loops similar to those used in hot-wire anemometry, and the power required to do this was measured throughout the bubble departure cycle for each heater in the array. Data were obtained at a wall superheat of 22.5 °C during saturated pool boiling of FC-72. Bubbles were observed to nucleate from a single site on the surface at this temperature. Evaluation of various heat transfer models are made.


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