Gas-solid flow in a diffuser:Effect of inter-particle and particle-wall collisions

作     者：Santosh Kumar Senapati Sukanta K.Dash Santosh Kumar Senapati;Sukanta K.Dash

作者机构：CFD LaboratoryDepartment of Mechanical EngineeringIndian Institute of Technology KharagpurWest Bengal721302India 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2021年第19卷第4期

页      面：187-200页

核心收录：

学科分类：081704[工学-应用化学] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081701[工学-化学工程] 0703[理学-化学] 0702[理学-物理学] 

主　　题：Gas-solid flow Diffuser Particle-wall collision Inter-particle collision Pressure recovery Reattachment length 

摘      要：This article investigates the role of the specularity coefficient(φ,the extent of the energy dissipation due to particle-wall collisions),inter-particle restitution coefficient(e_(pp),the extent of the energy dissipation due to inter-particle collisions),and four combinations of these variables on the hydrodynamics,and the pressure recovery of the dilute gas-solid suspension in a *** investigation applies the two-fluid modeling approach along with the kinetic theory of the granular *** present investigation’s findings indicate that an increase inφor a reduction in e_(pp) reduces the pressure recovery by weakening the reverse momentum transfer phenomenon,which is recognized as the primary means for the pressure ***,in a gas-solid flow system,a higherφor smaller e_(pp) enhances the particles’trapping in the recirculation *** recirculation zone’s strength and size increase asφincreases or e_(pp) ***,an increase in the wall-particle and inter-particle interactions strengthens the sidewise displacement of the *** effect of the wall-particle and inter-particle interactions are insignificant for extremely small solid loading.