Numerical study on the hydrodynamics of agglomerates at intermediate Reynolds numbers

作     者：Huanpeng Liu Shaowei Wang Chenyu Yang Taiping Chen Huanpeng Liu;Shaowei Wang;Chenyu Yang;Taiping Chen

作者机构：School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin 150001China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2020年第28卷第6期

页      面：1533-1541页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：financial support of the Natural Science Foundation of Heilongjiang Province of China(E2018031) 

主　　题：Agglomerate Permeability Reynolds number Drag coefficient 

摘      要：The flow pattern and hydrodynamics of a heterogeneous permeable agglomerate in a uniform upward flow at intermediate Reynolds numbers(1–40)are analyzed from three-dimensional(3 D)computational fluid dynamics *** from the homogeneous or stepwise-varying permeability models used in previous papers,a continuously radially varying permeability model is used in the present *** effects of two dimensionless parameters,the Reynolds number and the permeability ratio,on the flow field and the hydrodynamics were investigated in *** results reveal that unlike the solid sphere,a small recirculating wake initially forms inside the *** critical Reynolds number for the formation of the recirculating wake is lower than that of the solid sphere and it decreases with the increase of permeability ratio.A correlation of drag coefficient as a function of the Reynolds number and permeability ratio is *** of drag coefficients obtained by different permeability models show that at intermediate Reynolds numbers(1–40),the effect of radially varying permeability on the drag coefficient must be considered.