Cavitation activation by dual-frequency ultrasound and shock waves

Literature Information

Publication Date 2009-09-02
DOI 10.1039/B912725A
Impact Factor 3.676
Authors

Adam Brotchie, Robert Mettin, Franz Grieser, Muthupandian Ashokkumar


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Abstract

High-speed photographic observations of cavitation occurring under a low-frequency (21 kHz) sonotrode tip in the presence of an additional, high-frequency (355 kHz) ultrasound source have been made in water and in dilute aqueous solute solutions. Acoustic emission spectra were measured to support the visual observations. It was seen that a nucleating effect of the high-frequency action on cavitation at the low-frequency sonotrode was highly power dependent, with cavitation being homogenous at low acoustic power and highly localised at high acoustic power. The presence of solutes was found to significantly affect the cavitation structures and the bubble fragmentation process. Both the fundamental high-frequency acoustic emission peak and the higher order low-frequency harmonics were significantly intensified in the dual-frequency mode in the presence of these solutes. Additionally, the application of a high-voltage induced acoustic shock-wave to two different ultrasound fields was investigated in water and surfactant solutions.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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