Abstract

The paper presents results of an experimental study of the structure of gas-liquid flow in a slit microchannel with a cross section of \(200\times 1205\) \(\mu\)m and an aspect ratio of 1:6. The liquids used were ethanol and distilled water, and the gas was nitrogen; a cross-junction mixer performed the mixing. In the wide ranges of gas and liquid flow rates J\(_\mathrm{liq}=0.02\)–0.1 m/s and J\(_\mathrm{ gas}=0.03\)–73 m/s, characteristic patterns of gas-liquid flow were determined: the flow with elongated bubbles, transitional flow, stratified flow, stratified-wavy flow, stratified-wavy flow with droplet entrainment, and annular flow. Maps of flow patterns were constructed. The conditions were determined at which the liquid was displaced from menisci to the wide side of microchannel at high gas velocities with formation of wave flow in the liquid film.

中文翻译：

---

交叉路口混合器狭缝通道中气液流动模式的实验研究

摘要

本文介绍了截面为\(200\times 1205\)  \(\mu\) m、纵横比为1:6的狭缝微通道中气液流动结构的实验研究结果。所用液体为乙醇和蒸馏水，气体为氮气；交叉混合器进行混合。在宽范围的气体和液体流速 J \(_\mathrm{liq}=0.02\) –0.1 m/s 和 J \(_\mathrm{ gas}=0.03\)–73 m/s，确定了气液流动的特征模式：细长气泡流、过渡流、层流、层波流、带液滴夹带的层波流和环形流。构建了流动模式图。确定液体以高气体速度从弯液面转移到微通道宽边并在液膜中形成波流的条件。