title: Pressure-correlated dispersion of inertial particles in free shear flows.
abstract: We investigate the relationship between dispersion of inertial particles and the pressure field in free shear flows. A three-dimensional temporally developing particle-laden mixing layer and a three-dimensional spatially developing particle-laden plane jet are studied by means of direct numerical simulation. The incompressible Navier-Stokes equations are accurately solved without any turbulence model. The dispersed inertial particles are traced in the Lagrangian framework. It is found that the instantaneous spatial distribution of inertial particles correlates well with the Laplacian of pressure inverted delta2p , and from the statistical viewpoint, the effect of particle size on the fraction of particle number distributed within different flow zones characterized by inverted delta2p for different particles is negligible when the flow is well developed. The potential explanations and applications for this feature are explored.
authors.affiliation: State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, People's Republic of China.
authors.forename: Kun
authors.initials: K
authors.lastname: Luo
authors.forename: Jianren
authors.initials: J
authors.lastname: Fan
authors.forename: Kefa
authors.initials: K
authors.lastname: Cen