Analysis of particle and gas-phase velocities in solid-air multiphase turbulent boundary layer using conditional averaging technique

Abstract

To investigate the physics of the gas and particle phase in the particle laden turbulent flows, the velocity variations of gas and particle phases of turbulent boundary layer flows are simultaneously measured by the particle image velocimetry (PIV). Changing the particle size, and taking the conditional average based on the velocity of the gas phase and particle phase, the effects by the behavior of the particle and the particle size on stresses in the particle phase are investigated. It is found that rising particle greatly contributes to the Reynolds shear stress of the particle phase.