Nucleation threshold and deactivation mechanisms of nanoscopic cavitation nuclei
By B. Borkent, Stephan Gekle, Andrea Prosperetti, Detlef Lohse. 2009
172 citations recorded by the source corpus.
The acoustic nucleation threshold for bubbles trapped in cavities has theoretically been predicted within the crevice theory by Atchley and Prosperetti [“The crevice model of bubble nucleation,” J. Acoust. Soc. Am. 86, 1065 (1989)]. Here, we determine this threshold experimentally, by applying a single pressure pulse to bubbles trapped in cylindrical nanoscopic pits (“artificial crevices”) with radii down to 50 nm. By decreasing the minimum pressure stepwise, we observe the threshold for which the bubbles start to nucleate. The experimental results are quantitatively in good agreement with the theoretical predictions of Atchley and Prosperetti. In addition, we provide the mechanism which explains the deactivation of cavitation nuclei: gas diffusion together with an aspherical bubble collapse. Finally, we present superhydrophobic nuclei which cannot be deactivated, unless with a high-speed liquid jet directed into the pit.
Subfields: Biomedical Engineering, Materials Chemistry, Radiation
View Paper: https://www.semanticscholar.org/paper/6f51d4ab5f1e72f36c856620414d839ce8384bfb
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Citations in the corpus
- Bubble puzzles: From fundamentals to applications (2018, methodology): “In fact, by varying the diameter of the microhole down to 100 nm and less, we could quantitatively test [108] the crevice model of bubble nucleation [111–114].”
- Influence of Bubbles on the Energy Conversion Efficiency of Electrochemical Reactors (2020, methodology): “It is thought that the detachment of bubbles from crevices can induce liquid jet formation into the crevice, filling it, and prevent further bubble growth (leading to the hysteresis described in the nucleation subsection).(81,101) Other methods to induce early bubble detachment are discussed in deta”