Particle interaction with the wall surface in two-phase gas–solid particle flow

Abstract

Solid-particle impact interaction with material wall surfaces is a problem in many multiphase flow industrial devices. This interaction affected by flows around curved surfaces (aerodynamic effects) is analysed in this paper for generic wall geometry and carrier gas flow. The focus of this paper is to quantify the incidence and reflection of small (near-Stokesian) particles. Particle reflection threshold is found, and depends on both particle Stokes number and carrier gas flow near the wall surface. The analytical results are illustrated and compared with the computational results for cylindrical wall surfaces. The boundary layer theory is employed to predict the key model parameter. The analytical prediction agrees well with the computational results.