Journal
JOURNAL OF FLUID MECHANICS
Volume 663, Issue -, Pages 331-346Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022112010003538
Keywords
aerosols/atomization; breakup/coalescence; bubble collapse; bubble dynamics; jet formation; solid-liquid impact
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Funding
- Spanish Ministry of Education [DPI2008-06624-C03-01]
- NWO
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The capillary breakup of the high-speed Worthington jets ejected after a cavity collapse in water occurs due to the high-Reynolds-number version of the capillary end-pinching mechanism first described, in the creeping flow limit, by Stone & Leal (J. Fluid Mech., vol. 198, 1989, p. 399). Using potential flow numerical simulations and theory, we find that the resulting drop ejection process does not depend on external noise and can be described as a function of a single dimensionless parameter, We(S) =rho R(0)(3) S(0)(2)/sigma, which expresses the ratio of the capillary time to the inverse of the local strain rate, S(0). Here, rho and sigma indicate the liquid density and the interfacial tension coefficient, respectively, and R(0) is the initial radius of the jet. Our physical arguments predict the dimensionless size of the drops to scale as D(drop)/R(0) similar to We(S)(-1/7) and the dimensionless time to break up as T S(0) similar to We(S)(2/7). These theoretical predictions are in good agreement with the numerical results.
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