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Capturing drops with a thin fiber.

Elise Lorenceau1, Christophe Clanet, David Quéré

  • 1Laboratoire de Physique de la Matière Condensée, UMR 7125 du CNRS, Collège de France, 75231 Paris Cedex 05.

Journal of Colloid and Interface Science
|September 24, 2004
PubMed
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We investigated how liquid drops interact with fibers. A drop larger than a critical size cannot be captured, but smaller drops can be trapped if their impact velocity is below a certain threshold.

Area of Science:

  • Fluid dynamics
  • Surface science
  • Materials science

Background:

  • Understanding liquid drop-fiber interactions is crucial for applications like inkjet printing, fiber coating, and microfluidics.
  • The capture of liquid drops by fibers is a complex phenomenon influenced by drop size, velocity, and fiber properties.

Purpose of the Study:

  • To experimentally investigate the dynamics of liquid drops impacting horizontal fibers.
  • To characterize the critical conditions governing the capture of drops by fibers.

Main Methods:

  • Experimental setup involving controlled drop impacts on fibers.
  • High-speed imaging to analyze drop-fiber interaction dynamics.
  • Parametric study varying drop size, impact velocity, and fiber radius.

Related Experiment Videos

Main Results:

  • A critical drop radius was identified, above which capture is impossible regardless of impact velocity.
  • This critical radius is dependent on the fiber radius.
  • For drops smaller than the critical radius, capture depends on impact velocity: low velocities lead to full capture, while higher velocities result in liquid ejection.
  • The threshold impact velocity for drop capture was quantified.

Conclusions:

  • Fiber capture of liquid drops is governed by both drop size and impact velocity.
  • The study provides critical parameters for predicting and controlling drop-fiber interactions.