Journal
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
Volume 15, Issue 6, Pages 1514-1527Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JMEMS.2006.885975
Keywords
boiling; departure diameter; enhanced heat transfer; microchannels; nucleation frequency; nucleation site
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An experimental investigation is presented on flow boiling of deionized water in 227-mu m hydraulic diameter microchannels with reentrant type cavities. Key features of nucleate boiling are discussed. Active nucleation site density, bubble frequency and departure diameter, and flow patterns over mass velocities ranging from 41 kg/m(2)-s to 302 kg/m(2)-s and heat fluxes ranging from 28 to 445 W/cm(2) are studied. Similarities and differences with results obtained on large-scale systems and unenhanced microchannels are discussed.
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