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A Computational Investigation of the Effects of Particle Diameter and Particle–Particle Interactions on Jet Penetration Characteristics in a Gas–Solid Fluidized Bed with a Central Jet
Flow, Turbulence and Combustion ( IF 2.4 ) Pub Date : 2020-04-20 , DOI: 10.1007/s10494-020-00132-2
Jishnu Handique , Subrat Kotoky

Particle–particle interactions, quantified by particle–particle restitution coefficient ( e ) and particle diameter ( $$d_s$$ d s ) are two crucial parameters governing the flow hydrodynamics of dispersed gas–particle flows. In this work, a detailed numerical analysis has been carried out in order to get an insight into the effects of these two parameters on the jet penetration characteristics inside a bubbling gas–solid fluidized bed with a central jet. Specifically, the studies have been conducted to find out the effects of variations of these two parameters on the jet penetration length. It has been found that an increase in the value of particle diameter leads to a significant decrease in the jet penetration length for all other flow and physical properties remaining invariant. On the other hand, a gradual but substantial decrease in the jet penetration length has been observed with an increase in the values of e . Numerical investigations further reveal that there is no significant variation in the jet penetration characteristics for change in particle-wall interactions, quantified by the specularity coefficient ( $$\phi$$ ϕ ).

中文翻译:

具有中心射流的气固流化床中粒子直径和粒子-粒子相互作用对射流穿透特性影响的计算研究

粒子 - 粒子相互作用,由粒子 - 粒子恢复系数( e )和粒子直径( $$d_s$$$ds )量化是控制分散气体 - 粒子流的流动流体动力学的两个关键参数。在这项工作中,为了深入了解这两个参数对中心射流鼓泡气固流化床内射流穿透特性的影响,进行了详细的数值分析。具体而言,已经进行了研究以找出这两个参数的变化对射流穿透长度的影响。已经发现,对于保持不变的所有其他流动和物理特性,粒径值的增加导致射流穿透长度的显着减小。另一方面,已经观察到随着 e 值的增加,射流穿透长度逐渐但显着减少。数值研究进一步表明,粒子-壁相互作用变化的射流穿透特性没有显着变化,由镜面反射系数( $$\phi$$ ϕ )量化。
更新日期:2020-04-20
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