Scale separation and dependence of entrainment bubble-size distribution in free-surface turbulence

Yu, Xiangming; Hendrickson, Kelli; Yue, Dick KP

Scale separation and dependence of entrainment bubble-size distribution in free-surface turbulence

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Author(s)

Yu, Xiangming

•

Hendrickson, Kelli

•

Yue, Dick KP

Date Issued

2020

Journal

Journal of Fluid Mechanics

Publisher

Cambridge University Press (CUP)

Version

Final published version

Abstract

© The Author(s) 2019. We consider the size spectrum of entrained bubbles under strong free-surface turbulence (SFST). We investigate the entrainment bubble-size spectrum per unit (mean) interface area, , with dimension length, and develop a physical/mechanistic model for through energy arguments. The model obtains two distinct regimes of , separated by bubble-size scale. For bubble radius r-{0}]>, the effects of gravity dominate those of the surface tension force , and , where is the turbulence dissipation rate. For and

MIT Department

Massachusetts Institute of Technology. Department of Mechanical Engineering

Terms of Use

Creative Commons Attribution 4.0 International license

https://creativecommons.org/licenses/by/4.0/

Persistent DSpace Link

https://hdl.handle.net/1721.1/136590

DOI of Published Version

https://doi.org/10.1017/JFM.2019.986