CFD modeling to study the effect of particle size on dispersion in 20l explosion chamber: An overview

作     者：Santosh Kumar Ray Niroj Kumar Mohalik Asfar Mobin Khan Debashish Mishra Nikhil Kumar Varma Jai Krishna Pandey Pradeep Kumar Singh Santosh Kumar Ray;Niroj Kumar Mohalik;Asfar Mobin Khan;Debashish Mishra;Nikhil Kumar Varma;Jai Krishna Pandey;Pradeep Kumar Singh

作者机构：CSIR-Central Institute of Mining and Fuel ResearchDhanbad 826001India 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2020年第30卷第3期

页      面：321-327页

核心收录：

学科分类：0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

主　　题：Coal dust explosibility CFD 20l explosion chamber Dispersion Turbulent kinetic energy 

摘      要：Mine disasters occur predominantly due to methane or coal dust explosion or a combination of *** the top ten worst coal mine disasters in India, nine are due to coal dust explosion. The current paper describes a general overview of the parameters causing dispersion leading to coal dust explosion,and computational fluid dynamics(CFD) simulation study to observe the effects of particle size on dispersion in Indian coal mines. Turbulent kinetic energy(TKE) and velocity vector path of dust-air mixture and dust-free air were simulated to understand their effects on coal dust dispersion. The TKE contours and velocity vector paths for dust-free air were uniform and symmetrical due to resistance-free path available. The TKE contours and velocity vector paths for dust-air mixture shows the asymmetrical distribution of contours, due to entrainment of air with dust particles. Vortices were observed in velocity vector paths which gradually diminish on increment of time sequence. These vortices are dead centres where velocity and coal dust particles concentration are both zero.