Published 4 issues per year
ISSN Print: 0276-1459
ISSN Online: 1943-6181
Indexed in
GAS-LIQUID TWO-PHASE FLOW AND BOILING IN MINI AND MICROCHANNELS
ABSTRACT
This paper reviews work on adiabatic two-phase flow and forced flow boiling in microchannels with hydraulic diameters of the order 0.1 to 1 mm. In contrast to normal channels, stratification does not occur, the flow regimes are insensitive to channel orientation, and plug and slug/bubble train regimes are dominant. Pressure drop and void fraction are reasonably well predicted by models for macrochannels, except in annular or froth flows. In flow boiling, the onset of nucleate boiling (ONB) and onset of significant void (OSV) are more complex than in macrochannels. Critical heat flux in flow boiling has been extensive studied; for low flows it is dominated by film dryout but models developed for film dryout in macrochannels are unlikely to be applicable to microchaimels since many of their constituent relationships (e.g. droplet entrainment and deposition) would be expected to break down for this case.
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Hibiki T., Hazuku T., Takamasa T., Ishii M., Some characteristics of developing bubbly flow in a vertical mini pipe, International Journal of Heat and Fluid Flow, 28, 5, 2007. Crossref
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Delhaye Jean-Marc, McLaughlin John B, Appendix 4: Report of study group on microphysics, International Journal of Multiphase Flow, 29, 7, 2003. Crossref
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Hazuku Tatsuya, Ihara Tomonori, Hibiki Takashi, Measurement of local two-phase flow parameters of downward bubbly flow in mini pipes, Experimental and Computational Multiphase Flow, 2, 2, 2020. Crossref
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Flow regimes, in Physics of Gas-Liquid Flows, 2013. Crossref