Particle approach to a stagnation point at a wall: Viscous damping and collision dynamics

Qing Li (1, 2) , Micheline Abbas (1, 2) , Jeffrey F. Morris (3)

1 LGC - Laboratoire de Génie Chimique
2 FERMAT - Fédération de Recherche Fluides, Energie, Réacteurs, Matériaux et Transferts
3 Benjamin Levich Institute

Highly resolved numerical simulations by the immersed boundary method are used to study neutrally buoyant spherical particle motion when carried by fluid approaching a wall. The carrying flow studied is the Hiemenz-Homann (HH) axisymmetric straining flow into a stagnation point at a flat rigid wall, with a boundary layer of thickness 3δ = 3√ν/B, with B the strain rate of the flow and ν the kinematic viscosity of the fluid. The pressure in the carrying flow increases on approach to the stagnation point, as a result of the deceleration of the fluid.

Mots clés: Numerical Simulations; axisymmetric straining Flow; Particle; Fluid motion

Domaines: Génie des procédés

Qing Li, Micheline Abbas, Jeffrey F. Morris. Particle approach to a stagnation point at a wall: Viscous damping and collision dynamics. Physical Review Fluids, 2020, 5 (10), pp.0. ⟨10.1103/PhysRevFluids.5.104301⟩. ⟨hal-03117484⟩