Particle accumulation in square duct cavity with laminar flow: A four-way coupled CFD-DEM investigation of effects of particle-to-fluid density ratio and fluid Reynolds number using model validated against experimental setup
Translated title
Particle accumulation in square duct cavity with laminar flow
Authors
Ehlers, Anders Riishede ; Agesen, Andreas Overgaard ; Blæsbjerg, Line Dyhr Damsgaard
Term
4. term
Education
Publication year
2019
Pages
176
Abstract
In this project report a numerical model for the investigation of particle accumulation as subject to fluid flow in a simple geometry is developed. The geometry consists of a square duct, where a block is located over a cavity, which is initially filled with particles. The numerical model is developed using four-way coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) modelling framework. The CFD-DEM model is validated against experimental data using video capture and PIV is used for the determination of fluid flow rate. A parametric study of particletofluid density ratio and fluid Reynolds number indicates, that increasing fluid Reynolds number decreases the normalised friction factor, ratio of remaining particles in cavity and angle of incline, while increasing the density ratio increases all three.
Keywords
CFD ; DEM ; CFDEM ; CFD-DEM ; four-way coupled ; particle accumulation ; cavity ; laminar flow ; square duct ; eulerian-lagrangian ; granular flow ; sedimentation ; agglomeration ; PIV ; validation ; Liggghts ; OpenFOAM
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