In this study, a high-efficient CFD-based framework was developed for the comprehensive hydrodynamic evaluation of extraction columns. The core concepts of pseudo-3D and mean age theory were responsible for the optimal model geometry and steady transformation, respectively. The results indicate that the traditional 2D simplification is easy to cause the problems of geometrical deformation and turbulence distortion. By contrast, the pseudo-3D keeps all of the 3D hydrodynamic characteristics with smaller computational domain, so that it realizes the synergy of high accuracy and low cost. Meanwhile, the mean age theory transfers the unsteady species transport equation into a steady form so that it only takes tens of seconds for calculating the axial mixing. It was determined that the computational cost was reduced by ~20 times for the complete hydrodynamic estimation of a pulsed sieve-plate column. Hence, it is believed to be a high-efficient framework for the computer-aided process development of extractors.

在这项研究中，开发了一种基于CFD的高效框架，用于萃取塔的综合流体动力学评估。伪3D和平均年龄理论的核心概念分别负责优化模型的几何形状和平稳变换。结果表明，传统的二维简化容易引起几何变形和湍流畸变的问题。相比之下，伪3D在较小的计算域内保留了所有3D水动力特性，从而实现了高精度和低成本的协同作用。同时，平均年龄理论将非稳态物种迁移方程式转换为稳态形式，从而仅需数十秒即可计算轴向混合。已确定，对于脉冲筛板塔的完整流体力学估算，计算成本降低了约20倍。因此，据信这是用于提取器的计算机辅助过程开发的高效框架。