COMPUTATIONAL METHOD FOR DETERMINATION OF BUBBLE DISTRIBUTIONS IN LIQUIDS.

Abstract

An analytical method of determining the gas bubble spectrum in a liquid from the measured acoustic attentuation is examined. The analysis is based on the linearized equations of motion for a spherical bubble with damping. The bubbles are assumed to be homogeneously distributed in the liquid and the bubble concentration and damping are assumed constant in a small size interval. The acoustic wavelength is assumed much greater than the bubble dimensions and bubbles are assumed far enough apart that no interactions occur. The direct solution gives the acoustic attenuation of a known bubble distribution at any given frequency. An iteration precedure is incorporated in a FORTRAN program for converting acoustic attenuation as a function of frequency to bubble concentration as a function of size. For air bubbles in water, the effects of physical properties on the bubble spectrum are examined with the computer program. Experiments in a 12-inch water tunnel are described. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1969
Accession Number
AD0693445

Entities

People

  • Terry Brockett

Tags

DTIC Thesaurus Topics

  • Acoustic Attenuation
  • Attenuation
  • Computational Science
  • Computer Programs
  • Computers
  • Equations
  • Equations Of Motion
  • Frequency
  • Physical Properties
  • Spectra
  • Water Tunnels

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Underwater engineering and Marine Technology.