Abstract How to choose the interphase force and turbulence models is still an open question for Eulerian simulation of bubbly flows. It is well accepted that an unsteady k-e model that can simulate the meandering bubble plumes in a flat bubble column reactor (BCR) but fails to capture this phenomenon in a three-dimensional (3D) BCR. This work presents a GPU-accelerated fine-grid simulation with an unsteady k-e model with a Lattice Boltzmann Method (LBM) based mixture model developed by Shu et al. (2020b) for a square cross-sectioned BCR. A good quantitative agreement between the numerical results and experimental data from the literature is achieved without a lift force. This work highlights that GPU-accelerated fine-grid simulations with an unsteady k-e model can predict the bubble plumes in 3D BCRs, and that the lift force is not used in this case. The reason why lift is not needed in this case is discussed.

中文翻译：

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使用非定常 k-ε 模型对方形截面气泡柱中的振荡气泡羽流进行高分辨率模拟

摘要 如何选择相间力和湍流模型仍然是气泡流欧拉模拟的一个悬而未决的问题。人们普遍认为，可以模拟扁平泡罩塔反应器 (BCR) 中曲折气泡羽流的非定常 ke 模型无法在三维 (3D) BCR 中捕捉到这种现象。这项工作提出了 GPU 加速的精细网格模拟，该模拟具有非稳态 ke 模型，该模型具有由 Shu 等人开发的基于格子玻尔兹曼方法 (LBM) 的混合模型。(2020b) 用于方形横截面的 BCR。在没有升力的情况下，数值结果和文献中的实验数据之间实现了良好的定量一致性。这项工作强调了使用非稳态 ke 模型的 GPU 加速细网格模拟可以预测 3D BCR 中的气泡羽流，并且在这种情况下不使用升力。讨论了在这种情况下不需要提升的原因。