Motion and force characteristics of wet particles in a fluidized bed

IF 4.1 2区材料科学 Q2 ENGINEERING, CHEMICAL

Particuology Pub Date : 2025-02-19 DOI:10.1016/j.partic.2025.01.017

Zexin Zhong , Xiaoke Ku

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Abstract

The presence of liquid alters the motion and force behaviors of wet particles compared to their dry counterparts. To investigate these differences, this study established a wet particle model using the discrete element method coupled with computational fluid dynamics. After validating the model, the fluidization behavior and force characteristics of wet particles as well as reactor wall erosion were examined, focusing on the effects of inlet gas velocity, initial liquid content, liquid film surface tension, and liquid film viscosity. The results reveal that the existence of the liquid film play an important role in particle dynamics within the bed. Higher liquid film surface tension typically enhances both the average liquid bridge force and the average inter-particle contact force. However, increasing liquid film viscosity generally strengthens the average liquid bridge force but reduces the average contact force. Additionally, the presence of a liquid film generally reduces the accumulated erosion volume of the reactor wall. These observations provide valuable insights into the motion and force behavior of wet particles in a fluidized bed.

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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.