Cavity and Flow Measurements of Reproducible Bubble Entrainment Following Drop Impacts

Abstract

High-speed motion pictures of air-water interface dynamics of drop impacts that reproducibly make bubbles are presented. The pictures show previously unobserved details of the phenomenon. Measurements are compared with available computational methods. Experimental and numerical results agree with each other on the overall shape of the interface and the occurrence of bubble detachment. Measurements, however, show that the cavity depth stagnates before bubble entrapment. This behavior is not predicted by simulation. Also discussed are the presence of a jet that strikes the new bubble after formation and the possible effect of droplet surface oscillations on bubble entrainment.

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Document Details

Document Type
Technical Report
Publication Date
Apr 26, 2001
Accession Number
ADA394099

Entities

People

  • G. Chahine
  • H. Oguz
  • Paul A Elmore

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustics
  • Cameras
  • Computational Science
  • Department Of Defense
  • Dynamics
  • Entrainment
  • Fluid Flow
  • Government (Foreign)
  • Governments
  • Measurement
  • Motion Picture Projectors
  • Motion Pictures
  • Oscillation
  • Photography
  • Simulations
  • Surface Tension
  • Test And Evaluation

Readers

  • Acoustical Oceanography.
  • Fluid Dynamics.
  • Theoretical Analysis.