Visualizations of Bubble Motions and Temperature Rises by Focused Ultrasound
| Autor: | Nobuo Tsurumi, Yoichiro Matsumoto, Yoshiaki Tamura |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Bubble
Materials science business.industry Acoustics medicine.medical_treatment Two phase flow Physics::Medical Physics Ultrasound Finite difference method HIFU General Medicine Acoustic wave High-intensity focused ultrasound Physics::Fluid Dynamics medicine Microbubbles Two-phase flow CFD Porosity business Engineering(all) |
| Zdroj: | Procedia Engineering. 90:5-10 |
| ISSN: | 1877-7058 |
| DOI: | 10.1016/j.proeng.2014.11.801 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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