Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank

Qianqian Kang; Jinfan Liu; Xin Feng; Chao Yang; Jingtao Wang

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Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank

Review | Updated：2026-01-06

- Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank
- Chinese Journal of Chemical Engineering Vol. 41, Issue 1, Pages: 176-192(2022)
- Affiliations：
  
  1. School of Chemical Engineering and Technology, Tianjin University,Tianjin,China,300072
  2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  3. School of Chemical Engineering, Sichuan University,Chengdu,China,610065
  4. School of Chemical Engineering, University of Chinese Academy of Sciences,Beijing,China,100049
  5. Innovation Academy for Green Manufacture, Chinese Academy of Sciences,Beijing,China,100190
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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Qianqian Kang, Jinfan Liu, Xin Feng, Chao Yang, Jingtao Wang. Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank[J]. Chinese Journal of Chemical Engineering, 2022, 41(1): 176-192.
DOI：

Qianqian Kang, Jinfan Liu, Xin Feng, Chao Yang, Jingtao Wang. Isolated mixing regions and mixing enhancement in a high-viscosity laminar stirred tank[J]. Chinese Journal of Chemical Engineering, 2022, 41(1): 176-192. DOI：

摘要

Abstract

Laminar mixing in the stirred tank is widely encountered in chemical and biological industries. Isolated mixing regions (IMRs) usually exist when the fluid medium has high viscosity

which are not conducive to mixing. In this work

the researches on IMRs

enhancement of laminar mixing and the phenomenon of particle clustering within IMRs are reviewed. For most studies

the aim is to destroy IMRs and improve the chaotic mixing. To this end

the mechanism of chaotic mixing and the structure of IMRs were well investigated. The methods developed to destroy IMRs include off-centered agitation

dynamic mixing protocol

special designs of impellers

baffles

etc

. In addition

the methods to characterize the shape and size of IMRs as well as mixing effect by experiments and simulations are summarized. However

IMRs are not always nuisance

and it may be necessary in some situations. Finally

the present engineering applications are summarized

and the prospect of the future application is predicted. For example

particle clustering will form in the co-existing system of chaotic mixing and IMRs

which can be used for solid–liquid separation and recovery of particles from high viscosity fluid.

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