CFD simulations of gas–liquid–solid flow in fluidized bed reactors — A review
CFD simulations of gas–liquid–solid flow in fluidized bed reactors — A review
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DOI：
10.1016/j.powtec.2016.05.024
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发表时间：
2016-10
影响因子：
5.2
通讯作者：
Hui Pan;Xizhong Chen;X. Liang;Litao Zhu;Zheng‐Hong Luo
中科院分区：
文献类型：
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作者：
Hui Pan;Xizhong Chen;X. Liang;Litao Zhu;Zheng‐Hong Luo
气-液-固流化床反应器（FBR）在各种工业过程中的广泛应用和普及证明了其重要性，因此在过去进行了大量的理论分析、实验研究和计算流体力学（CFD）研究。关于三相流化床反应器的理论和实验研究已经有很多文献发表，但对三相流化系统的CFD方法研究较少。本文从理论和应用两个方面对三相流化床的CFD模拟进行了综述和分析，这对三相流化床反应器的放大、设计和控制策略的制定具有重要意义。CFD方法在三相流化床反应器中的应用基础是各种多尺度模型，如拟双流体模型、三流体模型、双流体模型+离散颗粒法（DSPs）、CFD +前沿跟踪（FT）/前沿捕获（FC）+离散颗粒法（DSPs）等，以及相互作用力的耦合基础理论。着重从宏观和微观两个层次分析了三相流化系统中各相的流体力学行为，分析了CFD方法在三相流化系统中的应用。本文还提出了三相流化床反应器CFD模拟的未来重点和挑战是提出具体的和适当的闭合律相间动量交换，将化学反应传输现象的属性纳入数值模型，并开发测量技术和提供更多的三相系统的实验数据。
Gas–liquid–solid fluidized bed reactors (FBRs) are of considerable importance as proved by their widespread use and popularity in various industrial processes, which results in extensive theoretical analyses, experimental investigations and computational fluid dynamics (CFD) studies in the past. Many reviews have been published concerning the theoretical and experimental works of three-phase FBRs while little effort is on the CFD approach of three-phase fluidization system. This review attempts to summarize and analyze CFD simulations for these three-phase fluidization systems from two aspects: the fundamentals and their applications, which are of paramount importance to the formulation of strategies for scale-up, design and control of three-phase FBRs. The fundamentals of CFD approach in the three-phase FBRs are focusing on various multi-scale models, such as pseudo two fluid model, three fluid model, two fluid model + discrete particle method (DPM), CFD + the front tracking (FT)/front capturing (FC) + DPM etc. and the coupling fundamental theories of interaction forces. With the emphasis on the hydrodynamics of individual phase at macroscopic or microscopic level, the applications of CFD approach for three-phase fluidization system are analyzed. This review also proposes that future emphasis and challenges of CFD simulation for three-phase FBRs are to present specific and appropriate closure laws for interphase momentum exchange, incorporate chemical reactions transport phenomena properties into numerical models, and develop measurement techniques and provide more experimental data for three-phase systems.