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Updated: Jun 18, 2026

Glass-Based Devices to Generate Drops and Emulsions
08:45

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Published on: April 5, 2022

Condensation-induced jumping water drops.

R D Narhe1, M D Khandkar, P B Shelke

  • 1Department of Physics and Applied Mathematics, University of Navarra, 31080 Pamplona, Spain.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
|November 13, 2009
PubMed
Summary
This summary is machine-generated.

Water droplets spontaneously jump on solid benzene during condensation, driven by melting at the contact line. This jumping phenomenon accelerates droplet growth and coalescence, impacting microscale heat transfer.

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Area of Science:

  • Thermodynamics
  • Fluid Dynamics
  • Materials Science

Background:

  • Condensation on solid surfaces can lead to complex phenomena.
  • Understanding droplet behavior is crucial for heat transfer applications.
  • Previous studies have not fully explored droplet jumping during condensation on specific substrates near melting points.

Purpose of the Study:

  • To experimentally and numerically investigate the phenomenon of water droplet jumping during vapor condensation on solid benzene.
  • To analyze the underlying mechanism of droplet jumping, relating it to substrate melting and wetting dynamics.
  • To characterize the jump dynamics and its effect on droplet growth and coalescence.

Main Methods:

  • Experimental observation of water droplet condensation and jumping on solid benzene near its melting point.
  • Numerical simulations to model the heat transfer, melting, and droplet dynamics.
  • Analysis of the relationship between drop radius (R), jump length, and condensation time.

Main Results:

  • Water droplets were observed to spontaneously jump on solid benzene during condensation.
  • The latent heat of condensation melts the substrate at the three-phase contact line, initiating the jump.
  • Droplet jumps occur over a length scale of approximately 1.5R, increasing coalescence and accelerating growth.

Conclusions:

  • Droplet jumping is a heat-transfer-driven phenomenon caused by localized substrate melting during condensation.
  • This jumping mechanism significantly influences droplet growth dynamics and coalescence rates.
  • The study provides insights into microscale heat transfer and phase change processes.