Enhanced particle mixing performance of liquid-solid reactor under non-periodic chaotic stirring

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chemical Engineering Research & Design Pub Date : 2024-09-18 DOI:10.1016/j.cherd.2024.09.027

Qiankun Liu , Shibo Wang , Jianxin Xu , Hui Sun , Hua Wang

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引用次数: 0

Abstract

This paper introduces the Chebyshev non-periodic chaotic stirring speed based on chaos theory. Additionally, it constructs the DEM-VOF coupled computational model to investigate non-periodic mixing within the reactor system. Numerical calculations are employed to compare and analyze Constant Stirring Speed (CSS) with Chebyshev Non-Periodic Chaotic Stirring Speed and its reverse (CRS, CRS-R). The results indicate that the number of particles deposited at the bottom of end diffusion decreases by 54.3 %. Moreover, it samples particle concentration per unit volume, resulting in a 70.3 % decrease in the Relative Concentration Standard Deviation (RCSD) of particles. Furthermore, it quantifies the mixing effect based on the distribution of distances between particles, leading to a 20.3 % increase in the Unit Block Mixing Index (UBMI). In conclusion, this study improves particle distribution characteristics by utilizing appropriate non-periodic variable speed intervals. Additionally, it provides technical support for production scenarios involving the mixing and dispersion of multiphase non-homogeneous systems.

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非周期性混沌搅拌下增强液固反应器的颗粒混合性能

本文介绍了基于混沌理论的切比雪夫非周期性混沌搅拌速度。此外，本文还构建了 DEM-VOF 耦合计算模型，以研究反应器系统内的非周期性混合。通过数值计算，比较分析了恒定搅拌速度（CSS）与切比雪夫非周期性混沌搅拌速度及其反向（CRS、CRS-R）。结果表明，沉积在末端扩散底部的颗粒数量减少了 54.3%。此外，它还对单位体积的颗粒浓度进行了采样，使颗粒的相对浓度标准偏差（RCSD）降低了 70.3%。此外，它还根据颗粒之间的距离分布来量化混合效果，从而使单位块混合指数（UBMI）提高了 20.3%。总之，这项研究通过利用适当的非周期性变速间隔改善了颗粒分布特性。此外，它还为涉及多相非均质系统混合和分散的生产方案提供了技术支持。

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

Chemical Engineering Research & Design 工程技术-工程：化工

CiteScore

6.10

自引率

7.70%

发文量

623

审稿时长

42 days

期刊介绍： ChERD aims to be the principal international journal for publication of high quality, original papers in chemical engineering. Papers showing how research results can be used in chemical engineering design, and accounts of experimental or theoretical research work bringing new perspectives to established principles, highlighting unsolved problems or indicating directions for future research, are particularly welcome. Contributions that deal with new developments in plant or processes and that can be given quantitative expression are encouraged. The journal is especially interested in papers that extend the boundaries of traditional chemical engineering.