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Julien Petit¹, David Rivière, Hamid Kellay

¹Laboratoire Ondes et Matière d'Aquitaine, University of Bordeaux, Unité Mixte de Recherche 5798, Centre National de la Recherche Scientifique, F-33400 Talence, France.

Proceedings of the National Academy of Sciences of the United States of America

|October 24, 2012

Summary

Liquid neck thinning dynamics shift from classical rules to thermal fluctuation dominance at the nanoscale. This crossover regime favors the production of uniform droplets by inhibiting satellite formation.

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Area of Science:

Fluid dynamics
Nanophysics
Interfacial science

Background:

Liquid neck thinning dynamics vary based on inertia, viscosity, or capillary forces.
At nanoscale dimensions, thermal interfacial fluctuations become significant.
Previous theory and observations suggest these fluctuations dominate nanojet breakup and nanowire fragmentation.

Purpose of the Study:

To characterize the universal dynamics of thermal fluctuation-dominated liquid neck thinning.
To identify the crossover point from classical to fluctuation-dominated regimes.
To investigate the impact of this crossover on satellite drop formation.

Main Methods:

Utilized near-critical interfaces to study liquid neck dynamics.
Analyzed the transition between classical and fluctuation-dominated pinch-off scenarios.
Examined satellite drop formation at the crossover regime.

Main Results:

Fully characterized the universal dynamics of the thermal fluctuation-dominated regime.
Demonstrated a crossover neck radius proportional to the thermal length scale.
Showed increased probability of producing monodisperse droplets at the crossover due to inhibited satellite formation.

Conclusions:

The crossover from classical to fluctuation-dominated thinning is well-defined and scales with thermal length.
The fluctuation-dominated regime offers a pathway to inhibit satellite drop formation, enabling monodisperse droplet production.
Further research is needed to clarify the interplay between neck profile evolution and satellite production across regimes.