Hydrodynamics of heterogeneous particle swarms in gas-liquid-solid stirred tanks with free surface studied by DEM-VOF

IF 4.5 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-05-10 DOI:10.1016/j.powtec.2025.121103

Dianyu E , Yingming Wen , Yiliu Wu , Jing Li , Weifu Sun , Yonggang Liu , Chao Chen , Jiaxin Cui , Yinxuan Qiu

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引用次数: 0

Abstract

Stirred tanks play a pivotal role in material blending, yet there is still a lack of data on inner complex blending mechanism, especially involving heterogeneous particle swarm with different shape combinations. This study extensively develops the DEM-VOF model, in which different drag force models are applied based on the identification of particle shapes. It aims to provide an insight into the blending system dynamics of heterogeneous particle swarms through seven arranged particle schemes building upon three different shapes. The results show that the oblate-prolate ellipsoid particle scheme has the optimal suspension performance, but demonstrates high power consumption. The addition of spherical particles into the oblate-prolate ellipsoid particle scheme has significant effect on particle suspension, fluid flow and the evolution of free surface, while contributes to a reduction in power consumption. This study presents an analysis of the hydrodynamics and optimization of blending systems involving heterogeneous particle swarms in stirred tanks.

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用DEM-VOF研究了自由表面气液固搅拌槽内非均质粒子群的流体动力学

搅拌槽在物料混合中起着至关重要的作用，但其内部复杂的混合机理，特别是不同形状组合的非均质颗粒群的混合机理，目前还缺乏相关数据。本研究广泛发展了DEM-VOF模型，该模型基于颗粒形状的识别，采用了不同的阻力模型。它的目的是通过建立在三种不同形状上的七种排列的粒子方案，提供对异质粒子群的混合系统动力学的洞察。结果表明，扁-长条形椭球粒子方案具有最佳的悬浮性能，但能耗较高。在扁-长条形椭球颗粒方案中加入球形颗粒对颗粒悬浮、流体流动和自由表面演化有显著影响，同时有助于降低功耗。本文研究了搅拌槽中涉及非均质颗粒群的混合系统的流体力学分析和优化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.