| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 857261 | Procedia Engineering | 2014 | 6 Pages |
Abstract
Ultrasound propagation in bubbly fluid was numerically analyzed to simulate HIFU (high intensity focused ultrasound) in human body with microbubbles injected into tissues. HIFU is one of promising non-invasive treatments and micorbubbles are expected to enhance heating of body tissues. As ultrasound shows nonlinearity near focal area, high-order perturbation equation of acoustic wave with void fraction (gas volume fraction) was derived and discretized with a finite difference method. Bubble motions and temperature rise due to the bubble oscillations were obtained and visualized with various initial bubble radii and void fractions.
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