Study on Gas-liquid Two-phase Flow in Parallel Rectangular Sudden Expansion Micro-channels
Enhanced heat transfer in microscale has been highlighted in the field of microelectronics. The gas-liquid flow patterns and pressure drop analysis are fundamental for the design and control of microfluidic systems. In this study, two-phase flow characteristics in parallel rectangular micro-channels...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Refrigeration Magazines Agency Co., Ltd.
2020-01-01
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| Series: | Zhileng xuebao |
| Subjects: | |
| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2020.02.130 |
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| Summary: | Enhanced heat transfer in microscale has been highlighted in the field of microelectronics. The gas-liquid flow patterns and pressure drop analysis are fundamental for the design and control of microfluidic systems. In this study, two-phase flow characteristics in parallel rectangular micro-channels with sudden expansion were studied by flow patterns visualization, theoretical analysis, and experimental study. Through visualization experiments, four typical flows, i.e., bubble flow, plug flow, slug flow, and annular flow, were observed in parallel rectangular micro-channels with sudden expansion. When Qg = 110 mL/min and Ql = 20mL/min, the two-phase flow pattern achieves the maximum jet state, and a full fluid jet appears. By?means?of?setting?up?a?total pressure drop prediction?model of the parallel rectangular micro-channel with sudden expansion at the mass velocity of two-phase flow ranges from 367 kg/(m2·s) to 691 kg/(m2·s), their applicability and accuracy were analyzed. The results showed that the average prediction?error is 18.56%, which is superior to the prediction accuracy in classical literature. Additionally, with the increase in the overall pressure drop, the prediction accuracy increases. |
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| ISSN: | 0253-4339 |