LIFETIME OF CAVITATION BUBBLES IN HIGH INTENSITY ULTRASONIC BIOPROCESSOR

Franco Marinozzi, Fabiano Bini, Simone Novelli

Abstract

The interaction between ultrasonic waves and biological tissues is the cause of cavitation phenomena. A primary scope of this paper was to set-up a measurement system for the generation of cavitation by means of forcing a low frequency (20 kHz). From the spectra and power density was evident the presence of the random component associated to the noise of cavitation was evident. For the estimate of this component the technique ARMA spectral was particularly effective. The average lifetime of transient cavitation bubbles estimated from the time constant via the ARMA spectrum, was found to be in agreement with the data in the literature.

Keywords

acoustic cavitation, noise spectra, ARMA modelling, bubbles lifetime

Download

IMEKO-WC-2012-TC13-O3.pdf

DOI

-

IMEKO TC

TC13 - Measurements in Biology and Medicine

Back to the proceedings