J. Phys. IV France
Volume 12, Numéro 7, August 2002
Page(s) 141 - 147

J. Phys. IV France
12 (2002) Pr7-141
DOI: 10.1051/jp4:20020277

Modeling and simulation of coal dust explosions

S. Zhong1, A. Teodorczyk2, X. Deng1 and J. Dang1

1  Industrial Explosion Protection Institute, Northeastern University, 110004 Shenyang, China
2  Institute of Heat Engineering, Warsaw University of Technology, 00-665 Warsaw, Poland

Existed work of former researchers on dust explosion/detonation modeling is reviewed. A coal dust explosion model is developed. Validation of the model is carried out for a type of coal with wide range of size distribution. The characteristics of presented model is: [1.] Eulerian-Lagrangian two phase flow model; [2.] Non-elemental Arrhenius model and Eddy Breakup model for gas reactions; [3.] Detail mechanisms of water vaporization, volatile decomposition and surface reaction of carbon; [4.] The $\kappa - \epsilon$ turbulence model for gas phase and random trajectory model for particle phase. Operator splitting method is employed to solve the governing equations. Flux Corrected Transport scheme is used to solve convective parts of the gas equations, and implicit scheme is used to solve the diffusion parts. The source terms are solved using an anti-stiff ordinary equation solver.

Key words: Coal, Dust Explosion, Modeling, Explosion Reaction Engineering, CFD

© EDP Sciences 2002