Accession Number : ADA132858

Title :   An Acoustic Levitation Technique for the Study of Nonlinear Oscillations of Gas Bubbles in Liquids.

Descriptive Note : Technical rept.,


Personal Author(s) : Young,D A ; Crum,Lawrence A

PDF Url : ADA132858

Report Date : 15 Aug 1983

Pagination or Media Count : 74

Abstract : A technique of acoustic levitation was developed for the study of individual gas bubbles in a liquid. Isopropyl alcohol and a mixture of glycerine and water (33-1/3% glycerine by volume) were the two liquids used in this research. Bubbles were levitated near the acoustic pressure antinode of an acoustic wave in the range of 20-22 kHz. Measurements were made of the levitation number as a function of the normalized radius of the bubbles. The levitation number is the ratio of the hydrostatic pressure gradient to the acoustic pressure gradient. These values were then compared to a nonlinear theory. Results were very much in agreement except for the region near the n=2 harmonic. An explanation for the discrepancy between theory and experiment appears to lie in the polytropic exponent associated with the gas in the interior of the bubble. (Author)

Descriptors :   *Bubbles, *Gases, *Interactions, *Sound pressure, *Computer programs, Liquids, Oscillation, Acoustic waves, Nonlinear systems, Water, Alcohols, Isomers, Propanols, Measurement, Pressure gradients, Glycerols, Mixtures, Cavitation

Subject Categories : Computer Programming and Software
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE