Mixing of miscible shear-thinning fluids in a lid-driven cavity

作     者：Junhao Wang Shugang Ma Peng Chen Zhipeng Li Zhengming Gao J.J.Derksen Junhao Wang;Shugang Ma;Peng Chen;Zhipeng Li;Zhengming Gao;J.J. Derksen

作者机构：Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing 100029China State Key Laboratory of Chemical Resource EngineeringSchool of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China PetroChina Petrochemical Research InstituteBeijing 102206China School of EngineeringUniversity of AberdeenAberdeen AB243UEUK 

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

年 卷 期：2023年第58卷第6期

页      面：112-123页

核心收录：

学科分类：080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0812[工学-计算机科学与技术（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The financial supports from the National Natural Science Foundation of China(22178014)。 

主　　题：Shear-thinning fluid Mixing of miscible fluids Particle image velocimetry Planar laser-induced fluorescence Species transport model Lid-driven cavity 

摘      要：The concentration and velocity fields of two refractive index matched miscible shear-thinning fluids in a lid-driven cavity were investigated by using planar laser-induced fluorescence and particle image velocimetry,as well by computational fluid dynamics.Quantitative analyses show that the results obtained by flow simulations with the species transport model are in good agreement with the experimental results.The effects of different parameters were studied by using the intensity of segregation.For two fluids with the same rheological parameters,the relative amounts of liquids H_(1)/H and the power-law index n dominate the mixing process while the Reynolds number Re plays a marginal role.As for two fluids with density difference,buoyancy has significant influence on the mixing process.The dimensionless group Ar/Re(redefined such as to include shear thinning behavior)is proposed for assessing the effect of buoyancy and rheological properties on the mixing of miscible shear-thinning fluids.