Abstract

A physics-based approach for modeling convective gas-liquid mass transfer across free surfaces in lab-scale agitated vessels is presented. This approach, which combines numerical modeling with semi-empirical turbulence theory, is validated across multiple operating scales and conditions. The findings show that, regardless of the mechanical action driving motion, free surface mass transfer rate in lab-scale systems is consistent with empirical relationships. The role and importance of free surface convective mass transfer in lab scale devices is also discussed. The computational approach is shown to be practical within the context of industrial analysis and design timescales.

摘要

提出了一种基于物理学的方法，用于模拟实验室规模搅拌容器中跨自由表面的对流气液传质。这种将数值建模与半经验湍流理论相结合的方法在多个操作规模和条件下得到了验证。研究结果表明，无论驱动运动的机械作用如何，实验室规模系统中的自由表面传质速率都与经验关系一致。还讨论了实验室规模设备中自由表面对流传质的作用和重要性。计算方法在工业分析和设计时间尺度的背景下被证明是实用的。