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Memoryless drop breakup in turbulence
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DOI：10.1126/sciadv.abp9561.png)
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摘要
En 中文
The breakup of drops and bubbles in turbulent fluids is a key mechanism in many environmental and engineer-ing processes. Even in the well-studied dilute case, quantitative descriptions of drop fragmentation remain elusive, and empirical models continue to proliferate. We here investigate drop breakup by leveraging a novel computer code, which enables the generation of ensembles of experiments with thousands of indepen-dent, fully resolved simulations. We show that in homogeneous isotropic turbulence breakup is a memoryless process whose rate depends only on the Weber number. A simple model based on the computed breakup rates can accurately predict experimental measurements and demonstrates that dilute emulsions evolve through a continuous fragmentation process with exponentially increasing time scales. Our results suggest a nonvanish-ing breakup rate below the critical Kolmogorov-Hinze diameter, challenging the current paradigm of inertial drop fragmentation.
Keyword:
SIZE DISTRIBUTION
BUBBLE BREAKUP
FLOW
HOMOGENIZATION
RATES
MODEL
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期刊
IF:
12.5
论文数:
2.0W
被引数:
18.1W
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