Exponentially fast Thinning of Nanoscale Films by Turbulent Mixing

Details Exponentially fast Thinning of Nanoscale Films by Turbulent Mixing Exponentially fast Thinning of Nanoscale Films by Turbulent Mixing

2011-12-18

arxiv.org/abs/1112.4150v1

Physics

Fluid Dynamics

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Scientific paper

Films are nanoscopic elements of foams, emulsions and suspensions, and form a paradigm for nanochannel transport that eventually tests the limits of hydrodynamic descriptions. Here, we study the collapse of a freestanding film to its equilibrium. The generation of nanoscale films usually is a slow linear process; using thermal forcing we find unprecedented dynamics with exponentially fast % accelerated ?? thinning. The complex interplay of thermal convection, interface and gravitational forces yields optimal turbulent mixing and transport. Domains of collapsed film are generated, elongated and convected in a beautiful display of chaotic mixing. With a timescale analysis we identify mixing as the dominant dynamical process responsible for exponential thinning.

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