The thesis investigates the process of a droplet impact on a solid surface. This phenomenon occurs in numerous natural and industrial processes, such as spray cooling, inkjet printing, and agricultural spraying. The study focuses on the influence of (i) droplet diameter and velocity, (ii) the liquid’s properties, particularly viscosity and surface tension, and (iii) the characteristics of the surface. Surfaces with different wettability were prepared, and a series of experiments were conducted on them with droplets of different liquids impacting the surface at different droplet velocities. Analysis of the droplet spreading dynamics upon impact revealed that, in addition to impact velocity, viscosity plays a key role in determining the maximum spreading factor. Furthermore, droplet breakup was analyzed, and an equation was derived to describe its breakup on a superhydrophobic surface during the retraction phase. The obtained results can contribute to a better understanding of the behavior of droplets on solid surfaces.
|
