Preferential Concentration of Finite Solid Particles in a Swirling von Karman Flow of Water

摘要

We present a study of preferential concentration with Voronoi diagrams of finite size solid particles in a von Karman flow. This flow is an interesting case of strongly inhomogeneous turbulence with high Re_λ. We investigate preferential concentration of PMMA particles with density ρp = 1400kg/m~3 and diameter 2.8 < d_p/η < 6.3 for 340 < Re_λ < 810. We conclusively find that particles form clusters and voids. The geometry of these structures is therefore studied, and results compared with previous works in other flows.