Particle resuspension by an impinging turbulent jet

We investigate the mechanisms of inertial particle resuspension and the formation of dust clouds due to an impinging downward jet in 3D Eulerian-Lagrangian simulations. We investigate the case of a turbulent slot jet at Reynolds number Re_D=1537 impinging on a bed of cohesion-less particles. The particles have a diameter of 90μm, density ratio ρ_p /ρ_f =2.6, and collide with a restitution coefficient of 0.6. Initially, the particles form a flat bed with the thickness equal to about 12 particle diameters. The impinging turbulent jet causes the resuspension of particles from the top layers of the bed, thus forming a crater. We investigate the morphology and depth of penetration of the vortical structures responsible for particle resuspension. We also investigate the clustering patterns of the suspended particles and their interaction with the vortex structures. Lastly, we characterize the depth and radius of the crater formed as a function of time.