4.5 Article

Gas-liquid hydrodynamics with different liquid viscosities in a split-and-recombine microchannel

出版社

ELSEVIER SCIENCE SA
DOI: 10.1016/j.cep.2022.108988

关键词

Split-and-recombine microchannel; Two-phase flow; Liquid viscosity; Flow regime; Void fraction; Pressure drop

资金

  1. National Natural Science Founda-tion of China [22008220]
  2. Natural Science Foundation of Zhejiang Province [LQ21B060009]
  3. Key Research and Development Program of Zhejiang Province [2020C01010]
  4. Fundamental Research Funds of Zhejiang Sci-Tech University [2021Q014]

向作者/读者索取更多资源

The flow regime, void fraction, and pressure drop of gas-liquid flow in a SAR microchannel were experimentally studied. Four flow regimes were observed, and correlations to predict regime transitions were presented. The SAR microchannel shows potential as an efficient gas-liquid contactor for highly viscous liquids.
Split-and-recombine (SAR) technology has shown great potential in the passive intensification of mass transfer. However, the gas-liquid flow is rarely encountered in the SAR microdevices. In this work, the flow regime, void fraction, and pressure drop of gas-liquid flow were experimentally studied in a common SAR microchannel designed with a curved divergence-convergence channel and rectangular obstacles. Parameter studies were conducted by varying the flow rates of nitrogen/glycerol aqueous solutions and glycerol contents. Four flow regimes, namely, total breakup, partial breakup, abnormal breakup, and annular flow are observed with a highspeed camera. The flow map and correlations to predict the regime transitions are presented based on the liquidphase Capillary number (0.0022-1.016) and gas/liquid rate (0.5-5). Furthermore, the modified frictional factor is correlated with Capillary and Reynolds numbers based on the flow regimes. Overall, the SAR microchannel is a promising candidate as the high-efficient gas-liquid contactor in terms of mass transfer rate, product selectivity, and energy efficiency for highly viscous liquids. A reasonable match of bubble length and the number of SAR units for the total breakup of bubbles is required. This study can contribute to the design, optimization, and regulation of the SAR microchannel for gas-liquid flows.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.5
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据