Cavitation bubbles occur in fluids subjected to rapid changes in pressure. We use billion-atom reactive molecular dynamics simulations on a 163 840-processor BlueGene/P supercomputer to investigate damage caused by shock-induced collapse of nanobubbles in water near an amorphous silica surface. Collapse of an empty bubble generates a high-speed nanojet, which causes pitting on the silica surface. We find pit radii are close to bubble radii, and experiments also indicate linear scaling between them. The gas-filled bubbles undergo partial collapse and, consequently, the damage on the silica surface is mitigated. © 2013 American Physical Society.
CITATION STYLE
Shekhar, A., Nomura, K. I., Kalia, R. K., Nakano, A., & Vashishta, P. (2013). Nanobubble collapse on a silica surface in water: Billion-atom reactive molecular dynamics simulations. Physical Review Letters, 111(18). https://doi.org/10.1103/PhysRevLett.111.184503
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