Spreading of thin films assisted by thermal fluctuations

Details Spreading of thin films assisted by thermal fluctuations Spreading of thin films assisted by thermal fluctuations

2005-09-30

arxiv.org/abs/cond-mat/0509803v1

Physical Review Letters 95, 244505 (2005)

Physics

Condensed Matter

Statistical Mechanics

5 pages, 3 figures

Scientific paper

We study the spreading of viscous drops on a solid substrate, taking into account the effects of thermal fluctuations in the fluid momentum. A nonlinear stochastic lubrication equation is derived, and studied using numerical simulations and scaling analysis. We show that asymptotically spreading drops admit self-similar shapes, whose average radii can increase at rates much faster than these predicted by Tanner's law. We discuss the physical realizability of our results for thin molecular and complex fluid films, and predict that such phenomenon can in principal be observed in various flow geometries.

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