Research on fluid motion characteristics and structural evolution in reciprocating mixing tanks

IF 3.7 3区工程技术 Q2 ENGINEERING, CHEMICAL

Chinese Journal of Chemical Engineering Pub Date : 2025-03-01 DOI:10.1016/j.cjche.2024.12.001

Li Wang , Shibo Wang , Huiqiang Yang , Yuling Zhai , Jianxin Xu

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Abstract

A new stirring method, reciprocating stirring, is developed by incorporating a periodic axial reciprocating motion into conventional stirring. This study employs computational fluid dynamics methods, utilizing volume of fluid and user-defined functions to control and analyze the flow field characteristics in a reciprocating stirred tank. Compared to conventional stirring, reciprocating stirring increases the overall fluid velocity by approximately 7.9%, turbulent kinetic energy (TKE) by 35.9% to 45.6%, and the turbulent dissipation rate by 10.6% to 15.7%. The primary reason is the dynamic integration of multiple flow regions, which enhances fluid interface interactions. Additionally, the study investigates the dynamic evolution of the vortex structure, uncovering the correlation between the impeller's start-stop behavior and the vortex area. The optimal impeller plate designs, forward sine-4/12D and reverse sine-5/12D, were determined based on the effective area of TKE. Reciprocating stirring, in comparison to conventional stirring, enhances secondary flow intensity by 67.3% to 93.7% and shortens mixing time by 56.6% to 173.0%.

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来源期刊

Chinese Journal of Chemical Engineering 工程技术-工程：化工

CiteScore

6.60

自引率

5.30%

发文量

4309

审稿时长

31 days

期刊介绍： The Chinese Journal of Chemical Engineering (Monthly, started in 1982) is the official journal of the Chemical Industry and Engineering Society of China and published by the Chemical Industry Press Co. Ltd. The aim of the journal is to develop the international exchange of scientific and technical information in the field of chemical engineering. It publishes original research papers that cover the major advancements and achievements in chemical engineering in China as well as some articles from overseas contributors. The topics of journal include chemical engineering, chemical technology, biochemical engineering, energy and environmental engineering and other relevant fields. Papers are published on the basis of their relevance to theoretical research, practical application or potential uses in the industry as Research Papers, Communications, Reviews and Perspectives. Prominent domestic and overseas chemical experts and scholars have been invited to form an International Advisory Board and the Editorial Committee. It enjoys recognition among Chinese academia and industry as a reliable source of information of what is going on in chemical engineering research, both domestic and abroad.