A meso-scale flow model of gas-liquid-solid mini-fluidized beds with improved macro-scale interaction of wall effects

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-02-01 DOI:10.1016/j.partic.2024.12.005

Shaojie Li , Yongli Ma , Hao Guo , Mingyan Liu

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引用次数: 0

Abstract

Gas-liquid-solid mini-fluidized beds known for high efficiency with controllable mass and heat transfer characteristics, have good application prospects in fields such as multiphase reaction process enhancement and intrinsic kinetic detection. For three-phase mini-flow systems, the bed wall has a significant impact on spatiotemporal distribution of multi-phase flow structure, which influence the motion state of dispersed phase, make predicted phase holdup and residence time deviate from experimental values. However, current research on the quantitative impact of bed walls on flow structures is still limited, which hinders the optimization design and industrial application of such reactors. In this work, a meso-scale flow model of gas-liquid-solid mini-fluidized beds considering macro-scale effects between bed wall and flow is developed based on the principle of meso-scale science and introducing semi-theoretical formulas that take the effects of bed walls on particles and bubbles into account. The calculated values of this model are in good agreement with experimental data, where prediction of phase holdup fits well with experimental results, the deviation of bubble size and terminal velocity are within 10%. Compared to existing models, this model demonstrates a higher level of accuracy in predicting the flow patterns of mini-fluidized beds, particularly those with pronounced wall effect. This research has laid a foundation for the design, scale-up and industrial application of mini-fluidized bed reactors.

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来源期刊

Particuology 工程技术-材料科学：综合

CiteScore

6.70

自引率

2.90%

发文量

1730

审稿时长

32 days

期刊介绍： The word ‘particuology’ was coined to parallel the discipline for the science and technology of particles. Particuology is an interdisciplinary journal that publishes frontier research articles and critical reviews on the discovery, formulation and engineering of particulate materials, processes and systems. It especially welcomes contributions utilising advanced theoretical, modelling and measurement methods to enable the discovery and creation of new particulate materials, and the manufacturing of functional particulate-based products, such as sensors. Papers are handled by Thematic Editors who oversee contributions from specific subject fields. These fields are classified into: Particle Synthesis and Modification; Particle Characterization and Measurement; Granular Systems and Bulk Solids Technology; Fluidization and Particle-Fluid Systems; Aerosols; and Applications of Particle Technology. Key topics concerning the creation and processing of particulates include: -Modelling and simulation of particle formation, collective behaviour of particles and systems for particle production over a broad spectrum of length scales -Mining of experimental data for particle synthesis and surface properties to facilitate the creation of new materials and processes -Particle design and preparation including controlled response and sensing functionalities in formation, delivery systems and biological systems, etc. -Experimental and computational methods for visualization and analysis of particulate system. These topics are broadly relevant to the production of materials, pharmaceuticals and food, and to the conversion of energy resources to fuels and protection of the environment.