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Updated: May 7, 2025

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Interfacial Dripping Faucet: Generating Monodisperse Liquid Lenses.

Lorène Champougny1,2, Vincent Bertin3, Jacco H Snoeijer3

  • 1<a href="https://ror.org/03ths8210">Carlos III University of Madrid</a>, Thermal and Fluids Engineering Department, Avenida de la Universidad, 30 (Sabatini building), 28911 Leganés (Madrid), Spain.

Physical Review Letters
|January 3, 2025
PubMed
Summary
This summary is machine-generated.

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Researchers created a liquid-liquid-gas system mimicking a dripping faucet. This study reveals periodic pinch-off phenomena, generating uniform floating lenses and offering insights into emulsion dynamics.

Area of Science:

  • Fluid dynamics
  • Interfacial science
  • Colloid and interface science

Background:

  • The dripping faucet is a classic system for studying fluid dynamics and instabilities.
  • Understanding interfacial phenomena is crucial for various applications, including emulsion formation and stability.

Purpose of the Study:

  • To present a novel liquid-liquid-gas system as a surface analog to a dripping faucet.
  • To investigate the dynamics of periodic pinch-off and lens formation at liquid-liquid interfaces.
  • To explore the transition to a jetting regime in this interfacial system.

Main Methods:

  • Experimental setup involving a viscous liquid sliding down an immiscible meniscus.
  • Observation and analysis of the periodic pinch-off of the liquid filament.

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  • Characterization of the generated monodisperse floating lenses.
  • Analogous description to single-phase dripping faucet dynamics.

    • Main Results:

    • Periodic pinch-off of the filament was successfully observed.
    • A succession of monodisperse floating lenses was generated.
    • The system's behavior was described analogously to single-phase systems, using the spreading coefficient instead of surface tension.
    • A transition to a jetting regime was identified.

    Conclusions:

    • The interfacial dripping faucet provides a new platform for studying interfacial fluid dynamics.
    • This system generates uniform droplets, relevant for emulsion technology.
    • The findings offer insights into the fundamental physics governing liquid-liquid-gas interfaces and emulsion dynamics.