This work presents a mesoscale model (MSM) simulating the laminar and turbulent gas phase fluid dynamics and concentration mixing in structured packings, used in absorption and distillation columns or static mixers. The MSM aims to provide computationally efficient predictions of the three-dimensional distributions of pressure, velocity and concentration in the structured packing’s gas phase. The MSM is successfully calibrated and validated with virtual experiments obtained from DNS (direct numerical simulations) of a single structured packing section featuring concentration mixing under uniform and maldistributed velocity inlet profiles. The packing section scenarios exhibit a variety of physical effects, like backflow, high-velocity fronts and blockage at the packing’s borders to the wall, which are all predicted correctly by the MSM. The physical effects have an impact on concentration mixing and velocity smoothing and are particularly interesting for applications of structured packings in dividing-wall columns or static mixers. Finally, the MSM is set up to simulate cylindrical columns with alternately rotated structured packing sections, including wall regions and wipers. MSM simulations of three packed columns of varying diameter are compared against experimental data and correctly predict the pressure drop dependence on the diameter, demonstrating the MSM’s potential for scale-up predictions.

这项工作提出了一个中尺度模型 (MSM)，用于模拟规整填料中的层流和湍流气相流体动力学和浓度混合，用于吸收和蒸馏塔或静态混合器。MSM 旨在提供对规整填料气相中压力、速度和浓度的三维分布的高效计算预测。MSM 通过从单一规整填料段的 DNS（直接数值模拟）获得的虚拟实验成功校准和验证，该规整填料段具有在均匀和不均匀分布的速度入口剖面下的浓度混合。填料部分场景表现出各种物理效应，如回流、高速前沿和填料与壁的边界处的堵塞，这些都被 MSM 正确预测。物理效应对浓度混合和速度平滑有影响，并且对于规整填料在分隔壁塔或静态混合器中的应用特别有趣。最后，设置 MSM 以模拟具有交替旋转的规整填料部分的圆柱柱，包括壁区域和擦拭器。将三个不同直径填充柱的 MSM 模拟与实验数据进行比较，并正确预测压降对直径的依赖性，证明 MSM 放大预测的潜力。MSM 被设置为模拟具有交替旋转的规整填料部分的圆柱柱，包括壁区域和擦拭器。将三个不同直径填充柱的 MSM 模拟与实验数据进行比较，并正确预测压降对直径的依赖性，证明 MSM 放大预测的潜力。MSM 被设置为模拟具有交替旋转的规整填料部分的圆柱柱，包括壁区域和擦拭器。将三个不同直径填充柱的 MSM 模拟与实验数据进行比较，并正确预测压降对直径的依赖性，证明 MSM 放大预测的潜力。