Mass transfer in liquid-liquid Taylor flow in a microchannel: Local concentration distribution, mass transfer regime and the effect of fluid viscosity
Mass transfer in liquid-liquid Taylor flow in a microchannel: Local concentration distribution, mass transfer regime and the effect of fluid viscosity
复制标题
微通道中液-液泰勒流的传质：局部浓度分布、传质状况和流体粘度的影响
DOI：
10.1016/j.ces.2020.115734
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发表时间：
2020-09-21
影响因子：
4.7
通讯作者：
Chen, Guangwen
中科院分区：
文献类型：
--
作者：
Yao, Chaoqun;Ma, Haiyun;Chen, Guangwen
Mass transfer characteristics of liquid-liquid Taylor flow with various fluid pairs are investigated, in order to reveal the viscous effects of the fluids. The concentration pattern in continuous slugs, mass transfer time and mass transfer coefficient are discussed and analyzed. Several different concentration patterns originated from recirculation are observed at both straight channels and curved bends, respectively. It is shown that the mass transfer coefficient (Ka and K) can increase with the increase in the viscosity of the continuous phase at large flow rates, which is explained by the increased contribution of the film at the lateral droplet side and its exchange with the bulk slug. Based on the dominance of different parts (i.e., film, cap), three mass transfer regimes are distinguished. Correlations for each regime, which covers a wide range of fluid viscosity of 0.89-45.6 mPa.s, are developed to predict the mass transfer coefficient. (c) 2020 Elsevier Ltd. All rights reserved.
