An improved theory for the prediction of microcavitation thresholds

Author

Holland, Christy K. ; Apfel, Robert E.

Author_Institution

Yale Univ., New Haven, CT, USA

Volume

36

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

204

Lastpage

208

Abstract

An approximate analytical formulation is presented that allows for the calculation of acoustic pressure thresholds for transient cavitation over a variety of frequencies and host fluid parameters. Specifically, R.E. Apfel´s (1986) theory is extended to include an estimate of the time delay associated with the Laplace pressure, 2 sigma /R/sub 0/, where sigma is the surface tension and R/sub 0/ is the initial radius. Also presented is a correction factor for the time-averaged pressure difference, across the bubble wall during growth. An optimum size distribution of nuclei for the predisposition of a sample to microcavitation is exhibited. The role of transient cavitation in medical ultrasound is discussed.<>

Keywords

bubbles; cavitation; nonlinear acoustics; Laplace pressure; acoustic pressure; bubble; initial radius; medical ultrasound; microcavitation thresholds; surface tension; time delay; transient cavitation; Delay effects; Delay estimation; Displays; Frequency; Surface tension; Temperature; Transient analysis; Ultrasonic imaging; Viscosity;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.19152

Filename

19152