Adaptive mesh axi-symmetric simulation of droplet impact with a spherical particle in mid-air

Ikroh Yoon , Jalel Chergui (1) , Damir Juric (2, 1) , Seungwon Shin (3)

1 LISN - Laboratoire Interdisciplinaire des Sciences du Numérique
2 COMET - COuplages Multiphysiques Et Transferts - LISN
3 Hongik University

In this study, droplet-particle collisions in mid-air are numerically investigated for a wide range of collision parameters: Weber number, contact angle and droplet/particle diameter ratio (4 ≤ We ≤ 150, 20 • ≤ θ eqi ≤ 160 • , and Ω = 1/2 and 1). To perform these simulations in an efficient manner, a simple dual grid based adaptive mesh refinement (SDG AMR) strategy is proposed and implemented in our existing multiphase flow solver. A total of 90 collision cases are systematically analyzed and are compared with results for the case of impact on a stationary particle to understand how mid-air collision characteristics are changed relative to those on a stationary target. The simulation results show that mid-air droplet-particle collision behavior is significantly different from that of droplet collision on a stationary particle, thus the impact phenomena cannot be interpreted by extrapolating collision results for a stationary target.

Mots clés: Droplet impact; Spherical particle; Mid-air collision; Multiphase flow; Numerical simulation

Domaines: Mécanique des fluides [physics.class-ph]

Ikroh Yoon, Jalel Chergui, Damir Juric, Seungwon Shin. Adaptive mesh axi-symmetric simulation of droplet impact with a spherical particle in mid-air. International Journal of Multiphase Flow, 2022, 155, pp.104193. ⟨10.1016/j.ijmultiphaseflow.2022.104193⟩. ⟨hal-03741058⟩