Effect of temperature on rectified diffusion during ultrasound-induced heating
Journal
Journal of the Acoustical Society of America
Journal Volume
130
Journal Issue
5
Pages
3450-3457
Date Issued
2011
Author(s)
Abstract
Experimental observations of delayed-onset cavitation during ultrasound insonation have been suggested as being caused by a change in the size distribution of the bubble population due to rectified diffusion. To investigate this hypothesis, a single bubble model is used here to explore the effect of heating and the subsequent elevated temperatures on the rectified diffusion process. Numerical solution of the model, which includes the temperature dependences of seven relevant physical parameters, allows quantification of the change in the pressure threshold for rectified diffusion, as well as the importance of the bulk liquid saturation concentration in determining bubble evolution. Although elevated temperatures and liquid supersaturation reduce the rectified diffusion threshold, it remains coincident with the inertial cavitation thresholds at submicron bubble sizes at all temperatures. This observation suggests that changes in the nucleation environment, rather than bubble growth due to rectified diffusion, is a more likely cause of delayed-onset cavitation events. ? 2011 Acoustical Society of America.
Subjects
Bubble growth
Bubble size
Bulk liquid
Cavitation events
Effect of temperature
Elevated temperature
Experimental observation
Inertial cavitation threshold
Insonation
Numerical solution
Physical parameters
Rectified diffusion
Single bubbles
Submicron
Temperature dependence
Cavitation
Diffusion
Liquids
Ultrasonics
Bubbles (in fluids)
oxygen
water
article
computer simulation
diffusion
mathematical computing
motion
particle size
pressure
surface tension
temperature
theoretical model
time
ultrasound
Computer Simulation
Models, Theoretical
Motion
Numerical Analysis, Computer-Assisted
Oxygen
Particle Size
Pressure
Sonication
Surface Tension
Temperature
Time Factors
Water
SDGs
Type
journal article