Title :
Bubble Dynamics During Boiling in Enhanced Surface Microchannels
Author :
Kuo, Chih-Jung ; Kosar, A. ; Peles, Yoav ; Virost, Steven ; Mishra, Chandan ; Jensen, Michael K.
Author_Institution :
Dept. of Mech., Aerosp. & Nucl. Eng., Rensselaer Polytech. Inst., Troy, NY
Abstract :
An experimental investigation is presented on flow boiling of deionized water in 227-mum 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/m2-s to 302 kg/m2-s and heat fluxes ranging from 28 to 445 W/cm2 are studied. Similarities and differences with results obtained on large-scale systems and unenhanced microchannels are discussed
Keywords :
boiling; bubbles; large-scale systems; microchannel flow; nucleation; active nucleation site density; deionized water; enhanced bubble dynamics; flow boiling; heat fluxes; large-scale systems; nucleate boiling; surface microchannel; unenhanced microchannels; Aerospace engineering; Frequency; Heat transfer; Hydraulic diameter; Large-scale systems; Microchannel; Rough surfaces; Shape control; Surface roughness; Surface topography; Boiling; departure diameter; enhanced heat transfer; microchannels; nucleation frequency; nucleation site;
Journal_Title :
Microelectromechanical Systems, Journal of
DOI :
10.1109/JMEMS.2006.885975
