Numerical simulation of micro-mixing in gas-liquid and solid-liquid stirred tanks with the coupled CFD-E-model

Xiaoxia Duan; Xin Feng; Chong Peng; Chao Yang; Zaisha Mao

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Numerical simulation of micro-mixing in gas-liquid and solid-liquid stirred tanks with the coupled CFD-E-model

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- Numerical simulation of micro-mixing in gas-liquid and solid-liquid stirred tanks with the coupled CFD-E-model
- Chinese Journal of Chemical Engineering Vol. 28, Issue 9, Pages: 2235-2247(2020)
- Affiliations：
  
  1. CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences,Beijing,China,100190
  2. School of Chemical Engineering, University of Chinese Academy of Sciences,Beijing,China,100049
  3. SINOPEC Dalian Research Institute of Petroleum and Petrochemicals,Dalian,China,116045
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2020
- Accepted：
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Xiaoxia Duan, Xin Feng, Chong Peng, Chao Yang, Zaisha Mao. Numerical simulation of micro-mixing in gas-liquid and solid-liquid stirred tanks with the coupled CFD-E-model[J]. Chinese Journal of Chemical Engineering, 2020, 28(9): 2235-2247.
DOI：

Xiaoxia Duan, Xin Feng, Chong Peng, Chao Yang, Zaisha Mao. Numerical simulation of micro-mixing in gas-liquid and solid-liquid stirred tanks with the coupled CFD-E-model[J]. Chinese Journal of Chemical Engineering, 2020, 28(9): 2235-2247. DOI：

摘要

Abstract

The coupled CFD-E-model for multiphase micro-mixing was developed

and used to predict the micro-mixing effects on the parallel competing chemical reactions in semi-batch gas-liquid and solid-liquid stirred tanks. Based on the multiphase macro-flow field

the key parameters of the micro-mixing E-model were obtained with solving the Reynolds-averaged transport equations of mixture fraction and its variance at low computational costs. Compared with experimental data

the multiphase numerical method shows the satisfactory predicting ability. For the gas-liquid system

the segregated reaction zone is mainly near the feed point

and shrinks to the exit of feed-pipe when the feed position is closer to the impeller. Besides

surface feed requires more time to completely exhaust the added H

solution than that of impeller region feed at the same operating condition. For the solid- liquid system

when the solid suspension cloud is formed at high solid holdups

the flow velocity in the clear liquid layer above the cloud is notably reduced and the reactions proceed slowly in this almost stagnant zone. Therefore

the segregation index in this case is larger than that in t

he dilute solid-liquid system.

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