摘要： •Interstitial fluid density significantly influences density granular segregation.•Segregation is enhanced with increasing dimensionless modified density ratio.•The transition was observed at a Stokes number of approximately 13. We experimentally investigated the effects of interstitial fluid density and viscosity on density-induced granular segregation in a rotating drum. Image processing and a particle-tracking method were used for determining the segregation index and dynamic properties of granular materials. The results indicate that the interstitial fluid density has a crucial role in density-induced granular segregation. A dimensionless factor was defined for quantifying the effect of interstitial fluid density on density-induced granular segregation. The segregation intensity increased as the interstitial fluid viscosity increased. In addition, the Stokes number associated with density-induced granular segregation was discussed in this study. Final steady-state segregation index plotted as a function of the dimensionless modified density ratio S. [Display omitted] 出版者： Elsevier Ltd 出版日期： 2016-09-01 出處： International journal of multiphase flow, 2016-09, Vol.84, p.1-8 資源來源： ScienceDirect (Elsevier) Journals 版權： 2016 Elsevier Ltd 識別號： ISSN: 0301-9322 識別號： EISSN: 1879-3533 識別號： DOI: 10.1016/j.ijmultiphaseflow.2016.04.015
