Two-Phase Flow Regime Transitions in Microchannels: A Comparative Experimental Study

A comprehensive flow regime map for microchannel flow boiling with quantitative transition criteria

“…In recent years, a few studies [7][8][9][10][11] have developed flow regime maps for boiling in microchannels using similar axes as conventional maps with flow regime definitions pertinent to microscale boiling, and have shown that flow regime maps developed for larger tubes are inapplicable for predicting flow regime transitions in microchannels. Flow regime maps for adiabatic two-phase flow in microchannels have also been proposed through high-speed visualizations [12][13][14];…”

Effects of channel dimension, heat flux, and mass flux on flow boiling regimes in microchannels

“…Adiabatic two-phase flow patterns were investigated through high-speed visualizations and flow regime maps developed by Chung and Kawaji (2004), Hassan, Vaillancourt, and Pehlivan (2005), and Field and Hrnjak (2007). Field and Hrnjak (2007) showed that the flow maps developed for large channels were not suitable for prediction of the flow regimes in microchannels; also, flow maps were dependent on the specific fluid for which they were developed.…”

Visualization of Fuel Cell Water Transport and Performance Characterization under Freezing Conditions

“…Two-phase flow in GDL and gas channels presents especially difficult problems since the passages are capillary-scale, non-circular geometries with variable contact angles and manifold flow paths. There have been numerous studies in which macroscale modeling has been applied to microscale two-phase flow, yet correlations developed by one research group are rarely repeatable by another research group [59]. Recent research has demonstrated that two-phase flow pressure drop through a microchannel is significantly influenced by the channel wall wettability, channel geometry, contact line dynamics, interfacial shear, gas phase inertia and density wave oscillations [60][61][62][63].…”