Effects of coupling on turbulent gas-particle boundary layer flows at borderline volume fractions using kinetic theory

Abstract

This study is concerned with the prediction of particles’ velocity in a dilute turbulent gas-solidboundary layer flow using a fully Eulerian two-fluid model. The closures required for equationsdescribing the particulate phase are derived from the kinetic theory of granular flows. Gas phaseturbulence is modeled by one-equation model and solid phase turbulence by MLH theory. Resultsof one-way and two-way coupled approaches are compared with the available experimental andnumerical results. Results show that one-way coupled approach is more efficient for particulatevelocity prediction in dilute flows. But, if the gas-phase flow characteristics are desired, the twowaycoupled approach should be used. Effects of free stream velocity on the coupling arediscussed.

Keywords

• two-way coupled
• gas-particle flow
• kinetic theory
• turbulent boundary layer