流化床液固两相传质过程的模拟研究进展

液固两相流化床具有液固相接触效率高、传质和传热性能好、颗粒分布均匀等优点，已被广泛应用于众多工业过程中。然而，流化床中与传质过程耦合的颗粒流化的复杂非线性特征及其湍动特性，使得对传质过程特性的研究十分困难。且仅依靠实验观测和理论预测难以揭示多相流相互作用规律，无法获得全面和详细的速度场和浓度场分布情况。近年来，数值模拟的快速发展为深入探索流化床中液固两相流动行为及其与传质过程耦合问题提供了重要的途径。本文对流化床液固两相流动与传质过程模拟方法进行了综述，并对其未来研究趋势进行了展望。借助于计算传质学理论可以更精确地预测局部浓度的分布情况，进而可以深入分析液固两相流化床中的传质过程规律与传质特性，为液固两相流化床的设计和优化提供理论基础。

Review of numerical study on liquid-solids two-phase mass transfer process in fluidized bed

The liquid-solid two-phase fluidized bed has the advantages of high liquid-solid contact efficiency, good mass and heat transfer performance, uniform particle distribution, etc., and has been widely used in many industrial processes. However, due to the complex nonlinear characteristics and turbulent characteristics of the particle fluidization coupled with the mass transfer process in the fluidized bed, it is very difficult to study the characteristics of the mass transfer process. Moreover, it is difficult to reveal the interaction law of multiphase flow and impossible to obtain a comprehensive and detailed distribution of velocity field and concentration field only by relying on experimental observations and theoretical predictions. In recent years, the rapid development of numerical simulation has provided an important way for in-depth exploration of the liquid-solids two-phase flow behavior and its coupling with the mass transfer process in a fluidized bed. In this paper, the simulation methods of fluidized bed liquid-solids two-phase flow and mass transfer process are reviewed, and its future research trends is prospected. With the help of computational mass transfer (CMT) theory, the local concentration distribution can be predicted more accurately, and the mass transfer characteristics in the liquid-solids two-phase fluidized bed can be analyzed in depth, which provides the design and optimization of the liquid-solids two-phase fluidized bed a solid foundation.