On continuum modeling using kinetic-frictional models in high shear granulation

作     者：P.J.Abrahamsson S.Sasic A.Rasmuson 

作者机构：Department of Chemical EngineeringChalmers University of TechnologySE-412 96 GothenburgSweden Department of Applied MechanicsDivision of Fluid DynamicsChalmers University of TechnologySE-412 96 GothenburgSweden 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2014年第12卷第2期

页      面：124-127页

核心收录：

学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 08[工学] 0836[工学-生物工程] 

基　　金：Astra Zeneca 

主　　题：Kinetic theory of granular flowFrictional stressSeparation of scalesHigh shear granulationCouette shear cell 

摘      要：This short communication demonstrates why extreme caution has to be taken when applying conven- tional kinetic-frictional closures to continuum modeling of high shear granulation （HSG）, Conventional models refer to closure laws where the kinetic and frictional stresses are summed up to obtain the total stress field, In the simple, dense, and sheared system ofa Couette shear cell, the effect of the lack of scale separation on the model predictions is examined, both quantitatively and qualitatively. It is observed that the spatial resolution has a significant effect on the magnitude of the kinetic and frictional contributions to the solid phase stresses. With this new investigation and previous studies of HSG, it is concluded that conventional kinetic-frictional models are inadequate for continuum modeling of HSG.