Abstract In this study, a novel type of structured wire gauze packing was designed, investigated, and compared with initial packings to improve hydrodynamic performances. The results of the comparison indicated that the novel packing exhibits superior performances, especially in reducing the wall flow phenomenon and lowering pressure drop. Furthermore, a new multi-scale computational fluid dynamics (CFD) method was proposed for the first time to calculate the wet pressure drop of the structured wire gauze packing. A three-dimensional VOF CFD method was established at a small scale to simulate the liquid film on a wire gauze to obtain an appropriate liquid feeding rate and contact angle. Subsequently, based on a small-scale simulation, the effective wet area was calculated at mesoscale simulation. The wet area is an important parameter for building the mechanistic wet pressure drop model. Finally, the novel packing and the mechanistic model were successfully applied in a restructuring project to validate their accuracy and reliability.

中文翻译：

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新型结构化丝网填料湿压降模型的多尺度研究

摘要 在这项研究中，设计、研究了一种新型结构化金属丝网填料，并与初始填料进行了比较，以提高流体动力学性能。比较结果表明，新型填料表现出优越的性能，特别是在减少壁流现象和降低压降方面。此外，首次提出了一种新的多尺度计算流体动力学（CFD）方法来计算结构化丝网填料的湿压降。建立了小规模的三维VOF CFD方法，模拟金属丝网上的液膜，获得合适的进液速度和接触角。随后，在小尺度模拟的基础上，在中尺度模拟中计算了有效湿面积。湿面积是建立机械湿压降模型的重要参数。最后，新型填料和机械模型成功应用于重组项目，以验证其准确性和可靠性。