The effect of channel diameter on adiabatic two-phase flow characteristics in microchannels ☆

By P. M. Chung, M. Kawaji. 2004

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Flow boiling of water in a circular staggered micro-pin fin heat sink (2008, background): “Rapid bubble growth [33–35], different dependency, than in conventional scale, of the heat transfer coefficient on heat flux [9,31,36,37], mass flux, and quality [7,9], increased heat flux at the onset of nucleate boiling [7], and length scale dependency of the two-phase frictional multiplier [ 26 ,”
Correlations of two-phase frictional pressure drop and void fraction in mini-channel (2010, background): “These findings are accordant with what were reported in previous studies [1,2,7,24].”
A comprehensive flow regime map for microchannel flow boiling with quantitative transition criteria (2010, background): “Flow regime maps for adiabatic two-phase flow in microchannels have also been prop osed through high-speed visualizations [12-14]; however, it has been shown [9] that adiabatic flow regime maps are not suitable for the prediction of microscale boiling.”
Update on Condensation Heat Transfer and Pressure Drop inside Minichannels (2006, background): “Chung and Kawaji [ 12 ] observed bubbly, slug, churn, slug-annular, and annular flow during the adiabatic flow of nitrogen gas and water in horizontal circular tubes of an inner diameter of 0.”