SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (1): 236-241.DOI: 10.1016/j.cjche.2019.04.025

• Chemical Engineering Thermodynamics • Previous Articles     Next Articles

A study on periodic boundary condition in direct numerical simulation for gas-solid flow

Shiwen Liu1,2, Xiaowen Liu1,2, Feiguo Chen1, Limin Wang1, Wei Ge1,2   

  1. 1 State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-03-11 Revised:2019-04-23 Online:2020-03-31 Published:2020-01-28
  • Contact: Feiguo Chen, Wei Ge
  • Supported by:
    Supported by the National Natural Science Foundation of China (21821005, 91834303), Science Challenge Project (TZ2016001), the Key Research Program of Frontier Science of the Chinese Academy of Sciences (QYZDJ-SSW-JSC029) and the Strategic Priority Research Program of the CAS (XDA21030700).

A study on periodic boundary condition in direct numerical simulation for gas-solid flow

Shiwen Liu1,2, Xiaowen Liu1,2, Feiguo Chen1, Limin Wang1, Wei Ge1,2   

  1. 1 State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    2 School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 通讯作者: Feiguo Chen, Wei Ge
  • 基金资助:
    Supported by the National Natural Science Foundation of China (21821005, 91834303), Science Challenge Project (TZ2016001), the Key Research Program of Frontier Science of the Chinese Academy of Sciences (QYZDJ-SSW-JSC029) and the Strategic Priority Research Program of the CAS (XDA21030700).

Abstract: Direct numerical simulation (DNS) of gas-solid flow at high resolution has been carried out by coupling the lattice Boltzmann method (LBM) for gas flow and the discrete element method (DEM) for solid particles. However, the body force periodic boundary condition (FPBC) commonly used to cut down the huge computational cost of such simulation has faced accuracy concerns. In this study, a novel two-region periodic boundary condition (TPBC) is presented to remedy this problem, with the flow driven in the region with body force and freely evolving in the other region. With simulation cases for simple circulating fluidized bed risers, the validity and advantages of TPBC are demonstrated with more reasonable heterogeneity of the particle distribution as compared to the corresponding case with FPBC.

Key words: Direct numerical simulation, Periodic boundary condition, Two-region periodic boundary condition, Gas-solid flow, Heterogeneity

摘要: Direct numerical simulation (DNS) of gas-solid flow at high resolution has been carried out by coupling the lattice Boltzmann method (LBM) for gas flow and the discrete element method (DEM) for solid particles. However, the body force periodic boundary condition (FPBC) commonly used to cut down the huge computational cost of such simulation has faced accuracy concerns. In this study, a novel two-region periodic boundary condition (TPBC) is presented to remedy this problem, with the flow driven in the region with body force and freely evolving in the other region. With simulation cases for simple circulating fluidized bed risers, the validity and advantages of TPBC are demonstrated with more reasonable heterogeneity of the particle distribution as compared to the corresponding case with FPBC.

关键词: Direct numerical simulation, Periodic boundary condition, Two-region periodic boundary condition, Gas-solid flow, Heterogeneity