Investigation of break-up, splash, and fingerlike instabilities for a large water slug impact

Richard A. Jepsen, Suk Goo Yoon, Scott C. James

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The fluid physics of splashing, spreading, and dispersion of a large-scale water droplet is investigated both experimentally and with model simulation. Several new phenomena of the droplet impact beyond conventional Rayleigh-Taylor instability theory are reported. First, our experimental data show that the number of fingers or instabilities along the spreading rim cannot be predicted by Allen's (1975) Rayleigh-Taylor equation. Second, we report that the surrounding medium (air) along with impact angle and droplet shape upon impact affect ejection velocity and splashing. Finally, the fundamental instability of the finger formation along the spreading rim may be due to interactions initiated by the compressed and displaced air, rather than the spreading of the liquid decelerating through the air. Several important correlations between the droplet impact velocities, the amount of spray ejected, the spray ejection speed, and the number of fingers or instabilities are presented.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)0791837904, 9780791837900
DOIs
Publication statusPublished - 2006
Event2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006 - Chicago, IL, United States
Duration: 2006 Nov 52006 Nov 10

Other

Other2006 ASME International Mechanical Engineering Congress and Exposition, IMECE2006
CountryUnited States
CityChicago, IL
Period06/11/506/11/10

ASJC Scopus subject areas

  • Engineering(all)

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    Jepsen, R. A., Yoon, S. G., & James, S. C. (2006). Investigation of break-up, splash, and fingerlike instabilities for a large water slug impact. In American Society of Mechanical Engineers, Fluids Engineering Division (Publication) FED American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2006-14564