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Visualization of High Speed Liquid Jet Impaction on a Moving Surface
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Dripping, jetting and tip streaming.

J M Montanero1, A M Gañán-Calvo2

  • 1Depto. de Ingeniería Mecánica, Energética y de los Materiales and Instituto de Computación Científica Avanzada (ICCAEx), Universidad de Extremadura, E-06006 Badajoz, Spain.

Reports on Progress in Physics. Physical Society (Great Britain)
|July 11, 2020
PubMed
Summary
This summary is machine-generated.

This review connects fluid mechanics and microfluidics to explain dripping, jetting, and tip streaming phenomena. It links theoretical models with experimental observations for droplet-based microfluidic applications.

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Area of Science:

  • Fluid mechanics
  • Microfluidics
  • Interfacial phenomena

Background:

  • Dripping, jetting, and tip streaming phenomena are studied separately by fluid mechanics and microfluidics.
  • A global perspective linking fundamental aspects and applications is needed.

Purpose of the Study:

  • To review interfacial flows in droplet-based microfluidics from a global perspective.
  • To connect theoretical models with experimental observations in microfluidic configurations.

Main Methods:

  • Review of theoretical models for interfacial flows, including viscoelasticity, electric fields, and surfactants.
  • Analysis of jet stability and breakup mechanisms.
  • Focus on axisymmetric microfluidic configurations (electrospray, flow focusing).

Main Results:

  • Theoretical models for interfacial flows incorporating viscoelasticity, electric fields, and surfactants are presented.
  • Mechanisms of jet breakup into drops and tip streaming emergence are reviewed.
  • Scaling laws for droplet/bubble size and parameter windows for tip streaming are discussed for microfluidic configurations.

Conclusions:

  • This review bridges the gap between fundamental fluid mechanics and microfluidic applications.
  • It provides a comprehensive understanding of dripping, jetting, and tip streaming phenomena.
  • It offers prospects for both fundamental research and practical applications in microfluidics.