Mechanisms governing the settling velocities and spatial distributions of inertial particles in wall-bounded turbulence
Andrew D. Bragg, David H. Richter, Guiquan Wang
Abstract
We show that as inertial particles settle through a turbulent boundary layer, the mechanism responsible for enhancing their settling rate relative to the Stokes velocity transitions from being the preferential sweeping mechanism to the turbophoretic drift mechanism. We consider the corresponding effect on the particle concentration profiles and discuss how the Rouse model must be modified to account for particle inertia.
Topics & Concepts
SettlingTurbulenceBounded functionMechanicsInertial frame of referencePhysicsClassical mechanicsStatistical physicsMathematicsMathematical analysisThermodynamicsParticle Dynamics in Fluid FlowsAeolian processes and effectsFluid Dynamics and Turbulent Flows