The spreading and solidification of a molten droplet is governed a number of factors such as fluid inertia, viscosity, surface tension, surface wettability, heat transfer between the droplet and substrate, and surface thermal properties. Most numerical and experimental studies of droplet impact have considered a single molten droplet landing on a flat, solid surface. This paper investigates the sequential deposition of tin droplets with their centers offset using a three-dimensional model of droplet impact and solidification. The paper presents results from simulation of the successive deposition of two tin droplets onto a stainless steel substrate under conditions for which the experimental observations are available. Results from the model are compared with photographs of impacting droplets and found to agree well. Paper includes a German-language abstract.

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