Abstract The present investigation evaluated a microchannel with variable cross sections and internal elements by experimental and numerical methods. The numerical and experimental phase interface of gas-liquid two-phase flow is captured through the Coupled Level-Set and Volume-Of-Fraction (CLSVOF) method and the canny edge detection method, respectively. The microchannel is analysed with different baffle angles (bending angle of the baffle, BA), and the optimal BA is chosen. The optimization goal is to increase the area of high-shear region and reduce the area of other region. Experiments involving the microchannel with optimal 67.5° BA are conducted. The experimental results confirm the microchannel mixing potency that the optimal structure of the high-shear region accelerates the fluid velocity, amplifies disturbances resulting from the merging of different gas phases and promotes the expansion of the turbulent domain.

中文翻译：

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复杂微通道中气液两相流的数值模拟与实验研究

摘要 本研究通过实验和数值方法评估了具有可变截面和内部元件的微通道。气液两相流的数值和实验相界面分别通过耦合水平集和分数体积（CLSVOF）方法和canny边缘检测方法捕获。用不同的挡板角度（挡板的弯曲角度，BA）对微通道进行分析，选择最佳的 BA。优化目标是增加高剪切区域的面积，减少其他区域的面积。进行了涉及具有最佳 67.5° BA 的微通道的实验。实验结果证实了高剪切区优化结构加速流体速度的微通道混合效能，