Simulating particle settling in inclined narrow channels with the unresolved CFD-DEM method
Junsheng Zeng, Pengfei Tang, Heng Li, Dongxiao Zhang
Abstract
Sediment settling in inclined fractures (channels with high aspect ratio) is studied numerically. Unlike the conventional Boycott effect, heterogeneous particle-clustering plumes are observed from the simulation results. Granular-induced Kelvin-Helmholtz and Rayleigh-Taylor instabilities are found to be the dominating mechanisms in this process. This work deepens the understanding of the Boycott effect in fractures, and provides various quantitative relationships of acceleration ratio versus inclination angle.
Topics & Concepts
SettlingMechanicsBoycottParticle (ecology)AccelerationGeologySedimentationRayleigh scatteringMaterials sciencePhysicsSedimentClassical mechanicsGeomorphologyOpticsThermodynamicsPolitical scienceOceanographyPoliticsLawGranular flow and fluidized bedsLandslides and related hazardsParticle Dynamics in Fluid Flows