Dresden 2011 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 46: Micro- and Nanofluidics II
CPP 46.5: Vortrag
Freitag, 18. März 2011, 11:45–12:00, ZEU 222
Simulations of slip flow on rough and nanobubble-laden surfaces — •Jens Harting1,2, Christian Kunert2, and Jari Hyväluoma3 — 1Department of Applied Physics, Eindhoven University of Technology, Den Dolech 2, NL-5600MB Eindhoven, The Netherlands — 2Institute for Computational Physics, University of Stuttgart, Pfaffenwaldring 27, D-70569 Stuttgart, Germany — 3MTT Agrifood Research Finland, FI-31600 Jokioinen, Finland
On microstructured hydrophobic surfaces, geometrical patterns may lead to the appearance of a superhydrophobic state, where gas bubbles at the surface can have a strong impact on the fluid flow along such surfaces. In particular, they can strongly influence a detected slip at the surface. We present two-phase lattice Boltzmann simulations of a flow over structured surfaces with attached gas bubbles and demonstrate how the detected slip depends on the pattern geometry, the bulk pressure, or the shear rate. Further, we present recent results from the modeling of AFM based experiments for slip measurements and the investigation of fluid-surface interactions.