Large bubbles always undergo asymmetric paths due to the wake instability, which was rarely considered in the simulation of bubbly flow in complex flow systems such as bubble columns. Here, we propose a bubble path oscillation model considering the zigzag lateral motion caused by the periodic vortex shedding, which is added into the rectilinear bubble motion model in the Lagrange frame. This model is further adopted to simulate the flow of 4 mm bubbles with 680 < Re < 1000 in bubble columns, with the liquid flow predicted by the partially averaged Navier–Stokes model in the Euler frame. A parameter analysis is conducted by comparing the simulation results with the existing experimental data to determine the optimal oscillation amplitude of the path. The effects of oscillation amplitude on the bubble distribution, gas holdup, and flow field are further discussed. Our findings may contribute to the fundamental understanding and accurate simulation of bubbly flow.

中文翻译：

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使用部分平均的Navier-Stokes模拟和Euler-Lagrange方法中的路径振荡模型对气泡流动进行数值模拟

由于尾流的不稳定性，大气泡始终会经历不对称路径，而在复杂的流动系统（如气泡塔）中模拟气泡流动时很少考虑到这种不对称路径。在这里，我们提出了一个气泡路径振荡模型，该模型考虑了由周期性涡旋脱落引起的之字形横向运动，并将其添加到拉格朗日框架的直线气泡运动模型中。进一步采用该模型来模拟680 < Re时4 mm气泡的流动在气泡柱中<1000，液体流量由Euler框架中的部分平均Navier–Stokes模型预测。通过将仿真结果与现有的实验数据进行比较来进行参数分析，以确定路径的最佳振荡幅度。进一步讨论了振荡幅度对气泡分布，气体滞留率和流场的影响。我们的发现可能有助于对气泡流动的基本理解和准确模拟。