Effects of the Saffman lift force on particle statistics and turbulence modulation in two-phase flow
Jinchi Li, Ping Wang, Xiaojing Zheng
Abstract
The Saffman force is one of the key factors for particle transport and hence the interaction among phases in two-phase wall-bounded turbulence. This numerical work finds that the accumulation of particles near the wall and preferential concentration in low-speed streaks are suppressed by the lift force, leading to destruction of the conditional hairpin vortices and decreasing velocity fluctuations near the wall. However, in the outer layer, the particle-turbulence interaction is increased by the lift force because of higher particle concentration.
Topics & Concepts
TurbulenceLift (data mining)MechanicsParticle (ecology)PhysicsVortexWork (physics)Classical mechanicsMaterials scienceThermodynamicsGeologyComputer scienceOceanographyData miningParticle Dynamics in Fluid FlowsFluid Dynamics and Turbulent FlowsGranular flow and fluidized beds