A novel multiliquid-inlet rotating packed bed (MLI-RPB), compared to the conventional RPB, was demonstrated to result in higher gas–liquid mass-transfer in our previous studies (Chu et al., Ind. Eng. Chem. Res. 2014, 53, 18580–18584). A comprehensive understanding of the fluid flow inside the MLI-RPB is significant for the internal optimization. In this work, the gas flow in a MLI-RPB was investigated by three-dimensional computational fluid dynamics simulation. The simulated gas pressure drop was validated by the experimental data, within a deviation of ± 15%. Simulation results reveal that the MLI-RPB has special features in the hollow annular zones among packing rings. Five types of internal combinations were designed to improve the turbulence of the gas flow in the hollow annular zones. The tangential slip velocity, turbulent kinetic energy, and ratio of turbulent kinetic energy to overall gas pressure drop of the MLI-RPB with these internal combinations were 1–2, 1–4, and 1–4 times those of the original MLI-RPB, respectively.

中文翻译：

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多进液旋转填料床中的气体流动：三维数值模拟和内部优化

与传统的RPB相比，新型多液体入口旋转填充床（MLI-RPB）在我们先前的研究中被证明可导致更高的气液传质（Chu等人，Ind。Eng。Chem。Res。 2014年，53（18580–18584）。全面了解MLI-RPB内部的流体流动对于内部优化非常重要。在这项工作中，通过三维计算流体动力学模拟研究了MLI-RPB中的气流。通过实验数据验证了模拟的气体压降，偏差为±15％。仿真结果表明，MLI-RPB在填料环之间的空心环形区域具有特殊的特征。设计了五种类型的内部组合，以改善空心环形区域中气流的湍流。在这些内部组合下，MLI-RPB的切向滑移速度，湍动能和湍动能与总气体压降之比分别是原始MLI-RPB的1-2倍，1-4和1-4倍， 分别。