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DY: Fachverband Dynamik und Statistische Physik

DY 17: Focus: Droplets (joint session DY/CPP)

DY 17.8: Talk

Monday, March 12, 2018, 17:30–17:45, BH-N 334

Growing drops on an inclined plate: Onset of sliding — •Simeon Völkel, Jonas Landgraf, and Kai Huang — Experimentalphysik V, Universität Bayreuth, 95440 Bayreuth, Germany

Liquid drops sitting on or running down an inclined plane are ubiquitous in our daily lives. Their sliding can be triggered by tilting the surface at a fixed drop volume or by increasing the drop volume at a fixed inclination angle. Here, we present experiments on the latter protocol. Therefore we employ a conventional inkjet printhead, which provides a volume resolution of 23 picoliters, high repeatability, as well as the flexibility of following the drop's development by selecting different nozzles. Based on an analysis of both top view and side view images, we explore the evolution of the drop shape in the vicinity of the depinning transition and compare our results with numerical simulations.