Effect of hydrodynamic and fluid-solid interaction forces on the shape and stability of a droplet sedimenting on a horizontal wall
Hassan Farhat, Sasidhar Kondaraju, Sang-Kwon Na, and Joon Sang Lee
Accepted
In this paper, we study the sedimentation of droplet onto horizontal surfaces using a Shan and Chen multi-component lattice Boltzmann model. Numerical simulations are performed for static non wetting droplets and are compared with a theoretical model. Further simulations are performed using wetting droplets and changing the wetting characteristics of the surface. Novel study of droplet sedimentation with different wetting characteristics of wall surface shows three different regimes of droplet shapes. The process of different regimes can be controlled by changing the wetting characteristics of surface. It is observed that the droplet attains nonequilibrium region (NE) as the attraction force of surrounding droplet with the wall increases. This can lead to eventual break up of droplet.