Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

doi:10.1016/j.cjche.2024.03.007

中国化学工程学报 ›› 2024, Vol. 70 ›› Issue (6): 63-72.DOI: 10.1016/j.cjche.2024.03.007

Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

Hang Yang, Zhaojin Lu, Likun Ma, Wei Yin, Bingjie Wang, Zhishan Bai, Xiaoyong Yang

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

收稿日期:2023-10-10 修回日期:2024-03-16 出版日期:2024-06-28 发布日期:2024-08-05
通讯作者: Xiaoyong Yang,E-mail:xyyang@ecust.edu.cn
基金资助:
We gratefully acknowledge the financial support from the Shanghai Sailing Program, China (21YF1409500), the National Natural Science Foundation of China (22308100, 22308105), the State Key Laboratory of Chemical Engineering (SKL-ChE-23Z01), and the National Science Fund for Distinguished Young Scholars of China (22225804).

Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

Hang Yang, Zhaojin Lu, Likun Ma, Wei Yin, Bingjie Wang, Zhishan Bai, Xiaoyong Yang

School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China

Received:2023-10-10 Revised:2024-03-16 Online:2024-06-28 Published:2024-08-05
Contact: Xiaoyong Yang,E-mail:xyyang@ecust.edu.cn
Supported by:
We gratefully acknowledge the financial support from the Shanghai Sailing Program, China (21YF1409500), the National Natural Science Foundation of China (22308100, 22308105), the State Key Laboratory of Chemical Engineering (SKL-ChE-23Z01), and the National Science Fund for Distinguished Young Scholars of China (22225804).

摘要/Abstract

摘要： Multi-orifice cross-flow jet mixers (MOCJMs) are used in various industrial applications due to their excellent mixing efficiency, but few studies have focused on the micromixing performance of MOCJMs. Herein, the flow characteristics and micromixing performance inside the MOCJM were investigated using experiments and computational fluid dynamics (CFD) simulations based on the Villermaux/Dushman system and the finite-rate/modified eddy-dissipation model. The optimal A value was correlated with the characteristic parameters of MOCJMs to develop a CFD calculation method applicable to the study of the micromixing performance of the MOCJMs. Then the micromixing efficiency was evaluated using the segregation index X_S, and the effects of operational and geometric parameters such as mixing flow Reynolds number (Re_M), flow ratio (R_F), total jet area (S_T), the number of jet orifices (n), and outlet configuration on the micromixing efficiency were investigated. It was found that the intensive turbulent region generated by interactions between jets, as well as between jets and crossflows, facilitated rapid reactions. X_S decreased with increasing Re_M and decreasing R_F. Furthermore, MOCJMs with lower S_T, four jet orifices, and the narrower outlet configuration demonstrated a better micromixing efficiency. This study contributes to a deeper understanding of the micromixing performance of MOCJMs and provides valuable guidance for their design, optimization, and industrial application.

关键词: Multi-orifice cross-flow jet mixer, Micromixing performance, Finite-rate/modified eddy dissipation model, Computational fluid dynamics, Villermaux/Dushman reaction

Abstract: Multi-orifice cross-flow jet mixers (MOCJMs) are used in various industrial applications due to their excellent mixing efficiency, but few studies have focused on the micromixing performance of MOCJMs. Herein, the flow characteristics and micromixing performance inside the MOCJM were investigated using experiments and computational fluid dynamics (CFD) simulations based on the Villermaux/Dushman system and the finite-rate/modified eddy-dissipation model. The optimal A value was correlated with the characteristic parameters of MOCJMs to develop a CFD calculation method applicable to the study of the micromixing performance of the MOCJMs. Then the micromixing efficiency was evaluated using the segregation index X_S, and the effects of operational and geometric parameters such as mixing flow Reynolds number (Re_M), flow ratio (R_F), total jet area (S_T), the number of jet orifices (n), and outlet configuration on the micromixing efficiency were investigated. It was found that the intensive turbulent region generated by interactions between jets, as well as between jets and crossflows, facilitated rapid reactions. X_S decreased with increasing Re_M and decreasing R_F. Furthermore, MOCJMs with lower S_T, four jet orifices, and the narrower outlet configuration demonstrated a better micromixing efficiency. This study contributes to a deeper understanding of the micromixing performance of MOCJMs and provides valuable guidance for their design, optimization, and industrial application.

Key words: Multi-orifice cross-flow jet mixer, Micromixing performance, Finite-rate/modified eddy dissipation model, Computational fluid dynamics, Villermaux/Dushman reaction

Hang Yang, Zhaojin Lu, Likun Ma, Wei Yin, Bingjie Wang, Zhishan Bai, Xiaoyong Yang. Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers[J]. 中国化学工程学报, 2024, 70(6): 63-72.

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Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

Experimental and numerical investigations on micromixing performance of multi-orifice cross-flow jet mixers

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