Interface-resolved direct numerical simulations of the interactions between spheroidal particles and upward vertical turbulent channel flows
Chenlin Zhu, Zhaosheng Yu, Dingyi Pan, Xueming Shao
Abstract
The interactions between finite-size spheroidal particles and upward turbulent flows in a vertical channel are numerically simulated with a direct-forcing fictitious domain method at two particle settling coefficients . The settling particles tend to migrate towards the channel centre due to the Saffman effect, and the migration is strongest for the spherical particles. The non-spherical particles tend to align their long axes with the streamwise direction in the near-wall region, and perpendicular to the streamwise direction in the bulk region due to the significant settling effect.
Topics & Concepts
MechanicsTurbulenceDirect numerical simulationInterface (matter)Channel (broadcasting)Open-channel flowMaterials sciencePhysicsComputer scienceReynolds numberBubbleTelecommunicationsMaximum bubble pressure methodParticle Dynamics in Fluid FlowsFluid Dynamics and Turbulent FlowsAeolian processes and effects