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April 2017 - April 2019
University of Stuttgart
Field of study
- Aerospace Engineering
Understanding the interaction between droplets impacting onto surfaces are of major importance in a wide range of applications, such as spray cooling, agricultural sprays, spray coating and painting. Despite many relevant applications, studies on multiple droplets impact onto surfaces are still quite limited, and especially so on surfaces textured...
We study the vertical impact of a droplet onto a cubic pillar of comparable size placed on a flat surface, by means of numerical simulations and experiments. Strikingly, during the impact a large volume of air is trapped around the pillar side faces. Impingement upon different positions of the pillar top surface strongly influences the size and the...
Details on the fall speeds of raindrops are essential in both applications and natural events, such as rain-rate retrieval and soil erosion. Here, we examine the influence of turbulence on the terminal velocity of two water drops of different sizes. For the first time, computations of droplets in turbulent surroundings are conducted with a direct n...