SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2018, Vol. 26 ›› Issue (12): 2441-2447.DOI: 10.1016/j.cjche.2018.04.003

• Fluid Dynamics and Transport Phenomena • 上一篇    下一篇

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

Shan Zhu, Kai Wang, Yangcheng Lü   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • 收稿日期:2018-03-16 修回日期:2018-04-07 出版日期:2018-12-28 发布日期:2019-01-09
  • 通讯作者: Yangcheng Lü
  • 基金资助:

    Supported by the National Natural Science Foundation of China (21422603, U166212) and the National Science and Technology Support Program of China (2011BAC06B01).

Effects on the mixing process of a coiled tube after a T-junction: Simulation and correlation

Shan Zhu, Kai Wang, Yangcheng Lü   

  1. State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
  • Received:2018-03-16 Revised:2018-04-07 Online:2018-12-28 Published:2019-01-09
  • Contact: Yangcheng Lü
  • Supported by:

    Supported by the National Natural Science Foundation of China (21422603, U166212) and the National Science and Technology Support Program of China (2011BAC06B01).

摘要: Simulations were performed to examine the effects of a coiled tube after a T-junction on the mixing and flow characteristics. A coiled tube was found to have two effects:inducing a radial flow and flattening the axial velocity distribution, which enhances and weakens the mixing, respectively. In the straight tube section connecting the T-junction and coiled tube, the latter may dominate and cause the mixing to deteriorate. An experiment was performed with the Villermaux/Dushman method to verify the simulation results. Based on a mixing performance simulation with various fluid and geometric structure parameters, a dimensionless correlation was obtained that can be used to determine the mixing intensity along the coiled tube with a deviation of less than 1.5%. These results provide guidance for designing a coiled tube or optimizing the operating conditions to meet the mixing requirements of specific chemical processes.

关键词: Mixing, T-junction, Simulation, Coiled tube, Correlation, Flow

Abstract: Simulations were performed to examine the effects of a coiled tube after a T-junction on the mixing and flow characteristics. A coiled tube was found to have two effects:inducing a radial flow and flattening the axial velocity distribution, which enhances and weakens the mixing, respectively. In the straight tube section connecting the T-junction and coiled tube, the latter may dominate and cause the mixing to deteriorate. An experiment was performed with the Villermaux/Dushman method to verify the simulation results. Based on a mixing performance simulation with various fluid and geometric structure parameters, a dimensionless correlation was obtained that can be used to determine the mixing intensity along the coiled tube with a deviation of less than 1.5%. These results provide guidance for designing a coiled tube or optimizing the operating conditions to meet the mixing requirements of specific chemical processes.

Key words: Mixing, T-junction, Simulation, Coiled tube, Correlation, Flow