通过CFD-DEM模型确定梯度控制磁流化床的流态

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-06-25 DOI:10.1016/j.powtec.2025.121312

Balamurugan Deivendran , Hamed Hoorijani , Zhiheng Fan , Casper De Somer , Annelies Coene , Luc Dupre , Vladimir V. Galvita , Hilde Poelman , Kevin M. Van Geem , Geraldine Heynderickx

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引用次数: 0

摘要

由于近年来在工业上的应用，磁流化床（MFBs）已成为一个重要的研究领域。MFB操作相图，定位流化制度之间的边界，需要支持过程强化研究。建立了一种CFD-DEM模型，研究了磁性和非磁性Geldart D颗粒混合物的磁流化，并构建了磁场梯度向上作用和向下作用的磁优先和磁最后模式下MFBs的运行相图。通过分析各种操作条件下最小流化速度、最小鼓泡速度和偏析指标的变化，确定了不同的流态，包括固定床、部分和完全偏析床、磁稳定床和磁鼓泡床。此外，确定了磁性颗粒的质量分数对颗粒分布的影响，以确定其强化过程的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Determining flow regimes in gradient-controlled magnetically fluidized beds via CFD-DEM modelling

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Determining flow regimes in gradient-controlled magnetically fluidized beds via CFD-DEM modelling

Magnetically fluidized beds (MFBs) have become a prominent field of study, given their recent application in industry. MFB operational phase diagrams, locating the boundaries between fluidization regimes, are needed to support process intensification studies. A CFD-DEM model is developed to study magnetic fluidization of mixtures of magnetic and non-magnetic Geldart D particles, and construct operational phase diagrams for MFBs, operated in magnetic first and magnetic last mode, with upward acting and downward acting magnetic field gradients. Different flow regimes, including fixed bed, partially and completely segregated bed, magnetically stabilized bed, and magnetically bubbling bed, are identified by analysing variations in minimum fluidization velocities, minimum bubbling velocities, and segregation indices for a range of operating conditions. Additionally, the effect of magnetic particles' mass fraction on particle distribution is determined to establish its potential for process intensification.

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.