Print Email Facebook Twitter Fluid medium effect on stresses in suspensions of high-inertia rod-like particles Title Fluid medium effect on stresses in suspensions of high-inertia rod-like particles Author Mahajan, V.V. (TU Delft Intensified Reaction and Separation Systems) Mehmood, J. (TU Delft Fluid Mechanics) El Hasadi, Yousef M.F. (TU Delft Complex Fluid Processing) Padding, J.T. (TU Delft Complex Fluid Processing) Date 2019 Abstract The rheology of suspensions of high-inertia (or granular) non-spherical particles characterized by high particle Stokes and Reynolds numbers is rarely investigated. In this study, we investigate the rheology of suspensions of inertial rod-like particles of aspect ratio 4 subjected to shear flow. In particular, the effect of fluid medium (air, water) against dry granular simulations on the developed stresses is assessed. CFD-DEM simulations are performed for a periodic shear box for a range of shear rates and volume fractions of particles. The dependence of rheological properties like shear stress, normal stress difference, pressure and relative viscosity on volume fraction, shear rate, granular temperature and the particle orientation are discussed. These results provide insight into the macroscopic rheology of suspensions of rods and demonstrate that the effect of particle shape and surrounding fluid cannot be completely ignored. Air as a fluid medium shows similar scaling as compared to dry granular simulations, but the stress values are generally lower. We observe drastic change in both scaling and values for water as fluid medium. In all cases, the rods show strong alignment in the direction of shear. This study can be further extended to develop stress closures for use in Eulerian flow models. Subject CFD-DEMGranularNon-sphericalRheologyStressSuspension To reference this document use: http://resolver.tudelft.nl/uuid:e9b9a67e-cf34-4cb4-8912-c9ec40491a34 DOI https://doi.org/10.1016/j.cesx.2019.100030 ISSN 2590-1400 Source Chemical Engineering Science: X, 3 Part of collection Institutional Repository Document type journal article Rights © 2019 V.V. Mahajan, J. Mehmood, Yousef M.F. El Hasadi, J.T. Padding Files PDF 1_s2.0_S2590140019300371_main.pdf 1.62 MB Close viewer /islandora/object/uuid:e9b9a67e-cf34-4cb4-8912-c9ec40491a34/datastream/OBJ/view