Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid

Chinese Journal of Chemical Engineering ›› 2012, Vol. 20 ›› Issue (5): 883-888.

Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid

李少白¹, 马友光¹, 朱春英¹, 付涛涛¹, 李怀志²

1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Laboratory of Reactions and Process Engineering, Nancy-Université, CNRS, 1, rue Grandville, BP 20451, 54001. Nancy Cedex, France

收稿日期:2011-04-25 修回日期:2012-03-19 出版日期:2012-10-28 发布日期:2012-11-06
通讯作者: MA Youguang,E-mail:ygma@tju.edu.cn
基金资助:
Supported by the National Natural Science Foundation of China (21076139);the Opening Project of State Key Laboratory of Chemical Engineering (SKL-ChE-08B03);the Program of Introducing Talents of Discipline to Universities (B06006)

Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid

LI Shaobai¹, MA Youguang¹, ZHU Chunying¹, FU Taotao¹, LI Huaizhi²

1. State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. Laboratory of Reactions and Process Engineering, Nancy-Université, CNRS, 1, rue Grandville, BP 20451, 54001. Nancy Cedex, France

Received:2011-04-25 Revised:2012-03-19 Online:2012-10-28 Published:2012-11-06
Supported by:
Supported by the National Natural Science Foundation of China (21076139);the Opening Project of State Key Laboratory of Chemical Engineering (SKL-ChE-08B03);the Program of Introducing Talents of Discipline to Universities (B06006)

摘要/Abstract

摘要： The turbulence behavior of gas-liquid two-phase flow plays an important role in heat transfer and mass transfer in many chemical processes. In this work, a 2D particle image velocimetry (PIV) was used to investigate the turbulent characteristic of fluid induced by a chain of bubbles rising in Newtonian and non-Newtonian fluids. The instantaneous flow field, turbulent kinetic energy (TKE) and TKE dissipation rate were measured. The results demonstrated that the TKE profiles were almost symmetrical along the column center and showed higher values in the central region of the column. The TKE was enhanced with the increase of gas flow and decrease of liquid viscosity. The maximum TKE dissipation rate appeared on both sides of the bubble chain, and increased with the increase of gas flow rate or liquid viscosity. These results provide an understanding for gas-liquid mass transfer in non-Newtonian fluids.

关键词: non-Newtonian fluid, gas-liquid two-phase flow, turbulent kinetic energy, turbulent kinetic energy dissipation rate

Abstract: The turbulence behavior of gas-liquid two-phase flow plays an important role in heat transfer and mass transfer in many chemical processes. In this work, a 2D particle image velocimetry (PIV) was used to investigate the turbulent characteristic of fluid induced by a chain of bubbles rising in Newtonian and non-Newtonian fluids. The instantaneous flow field, turbulent kinetic energy (TKE) and TKE dissipation rate were measured. The results demonstrated that the TKE profiles were almost symmetrical along the column center and showed higher values in the central region of the column. The TKE was enhanced with the increase of gas flow and decrease of liquid viscosity. The maximum TKE dissipation rate appeared on both sides of the bubble chain, and increased with the increase of gas flow rate or liquid viscosity. These results provide an understanding for gas-liquid mass transfer in non-Newtonian fluids.

Key words: non-Newtonian fluid, gas-liquid two-phase flow, turbulent kinetic energy, turbulent kinetic energy dissipation rate

李少白, 马友光, 朱春英, 付涛涛, 李怀志. Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid[J]. Chinese Journal of Chemical Engineering, 2012, 20(5): 883-888.

LI Shaobai, MA Youguang, ZHU Chunying, FU Taotao, LI Huaizhi. Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid[J]. Chin.J.Chem.Eng., 2012, 20(5): 883-888.

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Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid

Turbulent Characteristic of Liquid Around a Chain of Bubbles in Non-Newtonian Fluid

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