Numerical investigation of drop spreading on a heated surface

Droplet impact is ubiquitous in nature and its occurrence can be observed in the raindrops falling on the water bodies, soil and solid surfaces. The interaction of the droplet with the soil causes the dispersion of the soil particles into the air along with the microbes. The study of the interfacial evolution of the droplet is of paramount importance to comprehend these natural phenomena. In this paper, numerical simulation of a droplet impacting on a heated surface was performed using the Volume of Fluid (VoF) solver and the Finite Volume Method. The accurate motion of the contact line has been modelled by including Kistler's contact angle model in the governing equations. Increasing the droplet Weber number, We=ρu2d/σ, produced more interfacial spread of the droplet on the solid surface. The presence of cross-wind during the droplet impact shifts its footprint on the surface and has a profound effect on the droplet retraction phase.