Berlin 2008 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 17: Poster I
DY 17.53: Poster
Dienstag, 26. Februar 2008, 16:00–18:00, Poster C
Mechanisms of the reflection of water jets on superhydrophobic surfaces — •Michael Scharnberg1, Sören Kaps2, Vladimir Zaporojtchenko1, Srdjan Milenkovic3, Achim Walter Hassel3, Franz Faupel1, and Rainer Adelung2 — 1Lehrstuhl für Materialverbunde, Institut für Materialwissenschaft, CAU Kiel — 2Funktionelle Nanomaterialien, Institut für Materialwissenschaft, CAU Kiel — 3Max-Planck-Institut für Eisenforschung, Düsseldorf
After impinging onto biological and artificial superhydrophobic surfaces water jets are observed to flow across the surface for a distance equal to several jet diameters before they are reflected off the surface as coherent jets under an angle that is close to or smaller than the angle of incidence. The influence of the water jet's velocity and angle of incidence on this intriguing phenomenon was examined in order to further the understanding of the physics involved. Based on the experimental data a simple theoretical model was derived which will be discussed as well as possible applications in microfluidics.