D113 微細管内気液二相スラグ流動様式に及ぼす液物性ならびに管特性の影響(OS10 混相流動)

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  • D113 Effects of liquid properties and microchannel characteristics on gas-liquid two-phase slug flow pattern

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Recently two-phase flow in microchannel has attracted attention, so gas-liquid two-phase slug flow has been investigated actively. But the flow pattern has been measured by void fraction in previous studies, so slug lengths have not been investigated very much. In this study, to control slug lengths at different situation of downstream we made slug flow by T-junction, and measured slug lengths and its variances at pair of different positions on tube, different length of tubes, different diameter of tubes, and different surface tension of liquid, hi experiments we used N_2 gas (18〜80 kPa) as gas phase and H_2O (2.00 〜 20.00 μl/min) and SDS-water solution as liquid phase. SDS is one of general surface-active agents. Gas and liquid phase are commingled at T-junction. And we measured slug lengths from time-series images observed by high speed video camera. We used 74 and 102 μm across glass tubes at observed place. In this study, the difference of diameter of the tube is the best influence parameter over slug lengths.

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