Title of article
Gas-Liquid Flow and Coalescence Characteristics of Bubbles in Expansion Microchannel
Author/Authors
Zhang ، Yuqi State Key Laboratory of Chemical Engineering - School of Chemical Engineering and Technology - Tianjin University , Guo ، Heng State Key Laboratory of Chemical Engineering - School of Chemical Engineering and Technology - Tianjin University , Zhu ، Chunying State Key Laboratory of Chemical Engineering - School of Chemical Engineering and Technology - Tianjin University , Fu ، Taotao State Key Laboratory of Chemical Engineering - School of Chemical Engineering and Technology - Tianjin University , Ma ، Youguang State Key Laboratory of Chemical Engineering - School of Chemical Engineering and Technology - Tianjin University
From page
181
To page
191
Abstract
The flow behavior of bubbles in the expansion of the microchannel is studied. Four stable flow patterns are observed: Double-Layer-Bubble Coalescence (DLBC), Hamburger-Double-Layer-Bubble Coalescence (HDLBC), Hamburger Flow Coalescence (HFC), and Non-Coalescence Hamburger Flow (NCHF). With the increase of gas velocity, the flow pattern changes gradually from DLBC to HDLBC, HFC, and UHFC. The experimental results show that the liquid film drainage time increases with the bubble length. The location of bubble coalescence is away from the inlet with the increase of bubble length and bubble velocity but moves towards the inlet with the increase of liquid slug length. A prediction equation of bubble coalescence position is proposed, which has a good prediction effect.
Keywords
Microchannel , Expansion channel , bubble , Coalescence , Flow pattern
Journal title
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Journal title
Iranian Journal of Chemistry and Chemical Engineering (IJCCE)
Record number
2767922
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