PULSATIONS AND GROWTH OF GAS-FILLED BUBBLES IN SOUND FIELDS

Abstract

The pulsations of a gas-filled bubble in a sound field are discussed with particular attention to the effect of the viscosity of the external liquid, the irreversible conduction of heat by the gas within the bubble, and the scattering of energy by the bubble. The expressions for the gas pressure within the bubble and the time rate of change of bubble radius are used to determine the rate at which gas diffuses in and out of a bubble of mean radius. A threshold for bubble growth, called the threshold for gaseous-type cavitation, is defined by the condition that the net flow of gas across the surface of the bubble will be zero. This average rate of gaseous diffusion can also be used to determine in a stepwise fashion the mean change of bubble radius with time. Transient effects are also discussed.

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Document Details

Document Type
Technical Report
Publication Date
Aug 08, 1952
Accession Number
AD0004142

Entities

People

  • Murray D. Rosenberg

Organizations

  • Harvard University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Signals
  • Acoustics
  • Energy
  • Equations
  • Frequency
  • Gas Laws
  • Heat Energy
  • Lepidoptera
  • Pressure Distribution
  • Sound Waves
  • Standing Waves
  • Steady State
  • Tensile Strength
  • Thermal Conductivity
  • Two Dimensional
  • Waves

Readers

  • Plasma Physics / Magnetohydrodynamics
  • Underwater engineering and Marine Technology.