Spatial Distribution of Acoustic Cavitation Bubbles at Different Ultrasound Frequencies
Muthupandian Ashokkumar, Judy Lee, Yasuo Iida, Kyuichi Yasui, Teruyuki Kozuka, Toru Tuziuti, Atsuya Towata
CHEMPHYSCHEM | WILEY-V C H VERLAG GMBH | Published : 2010
Images of sonoluminescence, sonophotoluminescence and sonochemiluminescence are recorded in order to semi-quantitatively compare the spatial distribution of the cavitation activity at three different ultrasound frequencies (170 kHz, 440 kHz and 700 kHz) and at various acoustic amplitudes. At all ultrasound frequencies investigated, the sonochemically active cavitation zones are much larger than the cavitation zones where sonoluminescence is observed. Also, the sonochemically active bubbles are observed at relatively lower acoustic amplitudes than that required for sonoluminescence bubbles to appear. The acoustic power required for the observation of the initial cavitation bubbles increases w..View full abstract
Awarded by Ministry of Education, Culture, Sports, Science and Technology, Japan
This work was supported by a Grant in Aid for Scientific Research (17310086) from the Ministry of Education, Culture, Sports, Science and Technology, Japan. MA acknowledges the award of AIST Visiting Fellowship.