Simulations of slip flow on nanobubble-laden surfaces

Details Simulations of slip flow on nanobubble-laden surfaces Simulations of slip flow on nanobubble-laden surfaces

2010-05-31

arxiv.org/abs/1005.5717v1

J. Phys.: Condens. Matter 23 (2011) 184106

Physics

Fluid Dynamics

22 pages, 12 figures

Scientific paper

10.1088/0953-8984/23/18/184106

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. Since a large slip leads to reduced friction, our results allow to assist in the optimization of microchannel flows for large throughput.

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