The present work focuses on the study of slugs occurring in a two-phase flow of a confined rectangular channel: conditions of appearance and effect on the flow behavior. Three-dimensional numerical simulations have been carried out to examine the effect of superficial air velocity on flow behavior. The Volume Of Fluid model (VOF) is used to track the air-water interface. Validation of the numerical model is obtained by comparing the results of the simulated axial velocity with experimental data determined using the Laser Doppler Anemometry (LDA) technique. The numerical results revealed that for a fixed water level and superficial water velocity, higher superficial air velocities generate a slug flow that causes channel blockage. The position of these slugs and the timing of their occurrence were correlated in terms of air and water superficial Reynolds numbers.

目前的工作重点是研究在受限矩形通道的两相流中出现的段塞：外观条件和对流动行为的影响。已经进行了三维数值模拟来检查表观空气速度对流动行为的影响。流体体积模型 (VOF) 用于跟踪气水界面。通过将模拟轴向速度的结果与使用激光多普勒测速 (LDA) 技术确定的实验数据进行比较，可以获得数值模型的验证。数值结果表明，对于固定的水位和表观水速，较高的表观空气速度会产生段塞流，导致通道堵塞。