Observation of Microhollows Produced by Bubble Cloud Cavitation
スポンサーリンク
概要
- 論文の詳細を見る
When an ultrasonic wave with sound pressure less than the threshold level of bubble destruction irradiates microbubbles, the microbubbles aggregate by an acoustic radiation force and form bubble clouds. The cavitation of bubble clouds produces a large number of microhollows (microdips) on the flow channel wall. In this study, microhollow production by bubble cloud cavitation is evaluated using a blood vessel phantom made of N-isopropylacrylamide (NIPA) gel. Microbubble dynamics in bubble cloud cavitation is observed by a microscope with a short pulse light emitted diode (LED) light source. Microhollows produced on the flow channel wall are evaluated by a confocal laser microscope with a water immersion objective. It is observed that a mass of low-density bubbles (bubble mist) is formed by bubble cloud cavitation. The spatial correlation between the bubble mist and the microhollows shows the importance of the bubble mist in microhollow production by bubble cloud cavitation.
- 2012-07-25
著者
-
Miwa Takashi
Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
-
Yamakoshi Yoshiki
Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
関連論文
- Shear Wave Velocity Estimation by Virtual Sensing Array Spectrum Analysis
- Effect of Ultrasonic Wave Irradiation Sequence in Microhollow Production Produced by Bubble Cavitation
- Optical Scattering Measurement of Microbubble Cloud Dynamics in Ultrasound
- Tissue Viscoelasticity Measurement System by Simultaneous Multiple-Frequency Excitation
- Observation of Microhollows Produced by Bubble Cloud Cavitation
- Microbubble Adhesion to Target Wall by Ultrasonic Wave Frequency Sweep Method
- Shear Wave Imaging Using Phase Modulation Component of Harmonic Distortion in Continuous Shear Wave Excitation
- Shear Wave Imaging Using Phase Modulation Component of Harmonic Distortion in Continuous Shear Wave Excitation (Special Issue : Ultrasonic Electronics) -- (Biomedical ultrasound)
- Simultaneous Observation of Bubble Clouds and Microhollows Produced by Bubble Cloud Cavitation