Abstract An improved liquid distribution model based on a volume cell (LDMvc) was proposed to predict the liquid load distribution in a packed column under offshore conditions. The LDMvc contained four tuning parameters. The LDMvc is an improvement of the existing intersection-based LDM since the number of model tuning parameters is reduced to four through a sophisticated flow split algorithm, and a gas flow distribution model can be associated with the LDMvc. Two experimental columns with inner diameters of 0.133 m and 0.4 m were packed with Mellapak 500X-like elements for a 1.4 m bed height and Mellapak 250X-like elements for a 4 m bed height, respectively. The 4 m bed height column was built on a sloshing machine to simulate ship movement. The liquid distribution inside the columns was measured using an electrical resistance tomography (ERT) system. The offshore conditions were a permanent tilt ranging from 2 to 6° and a roll motion with three amplitude-period pairs. The LDMvc, after tuning with the experimental data, reliably predicted the liquid load distribution in the packed columns under different tilts and roll motions.

中文翻译：

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永久倾斜和滚动作用下规整填料柱的基于体积单元的液体分布模型

摘要 提出了一种基于体积单元（LDMvc）的改进液体分布模型来预测海上条件下填料塔中的液体载荷分布。LDMvc 包含四个调整参数。LDMvc 是对现有基于交叉口的 LDM 的改进，因为模型调整参数的数量通过复杂的分流算法减少到四个，并且气体流量分布模型可以与 LDMvc 相关联。两根内径分别为 0.133 m 和 0.4 m 的实验柱分别填充了 Mellapak 500X 类元件（1.4 m 床高）和 Mellapak 250X 类元件（4 m 床高）。4 m 床高柱建立在晃荡机上以模拟船舶运动。使用电阻断层扫描 (ERT) 系统测量柱内的液体分布。离岸条件是 2 到 6° 的永久倾斜和具有三个振幅周期对的横摇运动。LDMvc 在对实验数据进行调整后，可靠地预测了不同倾斜和滚动运动下填充柱中的液体负载分布。