The magnetic field has been successfully used to intensify the liquid–solid contact performance in the fluidized bed, creating the magnetized fluidized bed (MFB). The MFBs with purely magnetizable particles and with the binary admixture of magnetizable and nonmagnetizable particles could be simply termed the pure MFB and admixture MFB, respectively. Their potential application in the chemical and biochemical industries has been thoroughly explored in the literature. However, a fundamental investigation on the hydrodynamics therein is far from sufficient, severely hindering the commercial application. For this reason, this review summarized the relevant findings, including (1) flow regime transition, (2) boundaries between two adjacent flow regimes, (3) unique features of the magnetically stabilized bed, (4) hysteresis phenomenon and bed voidage, (5) minimum fluidization velocity and terminal velocity, (6) numerical simulation and segregation of the admixture MFB, and (7) some explored applications. More importantly, the existing controversies and unsolved issues in this area were identified. Among others, the flow regime transition and unique hydrodynamic characteristics of each flow regime should be first clarified, only after which could the terminology describing all the flow regimes be unified and the results from different scholars be compared.

中文翻译：

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液固磁化流化床的流体力学综述

磁场已成功用于增强流化床中的液固接触性能，从而形成了磁化流化床（MFB）。具有纯可磁化颗粒以及具有可磁化和不可磁化颗粒的二元混合物的MFB分别可以分别称为纯MFB和混合物MFB。它们在化学和生化工业中的潜在应用已在文献中进行了深入研究。然而，对其中的流体动力学的基础研究还远远不够，严重地阻碍了商业应用。因此，本综述总结了相关的发现，包括：（1）流态转换，（2）两个相邻流态之间的边界，（3）磁稳定床的独特特征，（4）磁滞现象和床空隙，（5）最小流化速度和最终速度，（6）混合料MFB的数值模拟和分离，以及（7）一些探索性的应用。更重要的是，确定了该领域中存在的争议和未解决的问题。除其他外，应首先弄清每种流态的流态转变和独特的流体力学特性，然后才能统一描述所有流态的术语，并比较不同学者的结果。