Universal Spreading Dynamics of Liquid Drops on Partially Wetting Surfaces

Details Universal Spreading Dynamics of Liquid Drops on Partially Wetting Surfaces Universal Spreading Dynamics of Liquid Drops on Partially Wetting Surfaces

2012-01-19

arxiv.org/abs/1201.4005v2

Physics

Fluid Dynamics

Scientific paper

Liquid drops start spreading directly after brought into contact with a partial wetting substrate. Although this phenomenon involves a three-phase contact line, the spreading motion is very fast. We study the initial spreading dynamics of low-viscosity drops, using two complementary methods: Molecular Dynamics simulations and high-speed imaging. We access previously unexplored length- and time-scales, and provide a detailed picture on how the initial contact between the liquid drop and the solid is established. Both methods unambiguously point towards a universal spreading regime independent of wettability, with the contact radius growing as the square root of time.

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