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

Shiwen Liu; Xiaowen Liu; Feiguo Chen; Limin Wang; Wei Ge

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

Chemical Engineering Thermodynamics | Updated：2026-01-06

- A study on periodic boundary condition in direct numerical simulation for gas-solid flow
- Chinese Journal of Chemical Engineering Vol. 28, Issue 1, Pages: 236-241(2020)
- Affiliations：
  
  1. State Key Laboratory of Multiphase Complex Systems, 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
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2020
- Accepted：
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Shiwen Liu, Xiaowen Liu, Feiguo Chen, Limin Wang, Wei Ge. A study on periodic boundary condition in direct numerical simulation for gas-solid flow[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 236-241.
DOI：

Shiwen Liu, Xiaowen Liu, Feiguo Chen, Limin Wang, Wei Ge. A study on periodic boundary condition in direct numerical simulation for gas-solid flow[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 236-241. DOI：

摘要

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.

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