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Related Experiment Videos

Drops impacting a sieve.

Elise Lorenceau1, David Quéré

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

Journal of Colloid and Interface Science
|June 14, 2003
PubMed
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Liquid drops impacting plates with holes behave differently based on speed. Below a threshold, drops are captured; above it, liquid is ejected, with ejected volume quantified.

Area of Science:

  • Fluid dynamics
  • Impact mechanics
  • Surface tension phenomena

Background:

  • Understanding liquid drop impact is crucial for various industrial processes.
  • The behavior of liquid drops interacting with perforated surfaces is not fully understood.
  • Existing models often simplify the complex interplay of forces during impact.

Purpose of the Study:

  • To experimentally investigate the impact dynamics of liquid drops on thin plates with small holes.
  • To identify and characterize the critical velocity threshold for liquid ejection.
  • To quantify the volume of liquid ejected through the holes.

Main Methods:

  • High-speed imaging to capture drop impact and liquid behavior.
  • Force measurements to analyze deceleration forces acting on the drop.

Related Experiment Videos

  • Controlled experiments varying drop size, velocity, and hole dimensions.

    • Main Results:

    • Two distinct impact regimes were observed: complete drop capture and partial liquid ejection.
    • A critical impact velocity was identified, distinguishing between capture and ejection.
    • The volume of ejected liquid was quantified as a function of impact velocity and drop size.

    Conclusions:

    • The study provides a detailed characterization of liquid drop impact on perforated plates.
    • The findings offer insights into the forces governing drop capture versus ejection.
    • This research contributes to a better understanding of fluid behavior in micro-perforated systems.