Knudsen gas provides nanobubble stability
Fluid Dynamics
2011-09-09 v1 Soft Condensed Matter
Abstract
We provide a model for the remarkable stability of surface nanobubbles to bulk dissolution. The key to the solution is that the gas in a nanobubble is of Knudsen type. This leads to the generation of a bulk liquid flow which effectively forces the diffusive gas to remain local. Our model predicts the presence of a vertical water jet immediately above a nanobubble, with an estimated speed of , in good agreement with our experimental atomic force microscopy measurement of . In addition, our model also predicts an upper bound for the size of nanobubbles, which is consistent with the available experimental data.
Keywords
Cite
@article{arxiv.1109.1652,
title = {Knudsen gas provides nanobubble stability},
author = {James Seddon and Harold Zandvliet and Detlef Lohse},
journal= {arXiv preprint arXiv:1109.1652},
year = {2011}
}