Air trapping at impact of a rigid sphere onto a liquid

P.D. Hicks, E.V. Ermanyuk, N.V. Gavrilov, R. Purvis

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

An experimental and theoretical investigation of the air trapping by a blunt, locally spherical body impacting onto the free surface of water is conducted. In the parameter regime previously studied theoretically by Hicks & Purvis (J. Fluid Mech., vol. 649, 2010, pp. 135-163), excellent agreement between experimental data and theoretical modelling is obtained. Earlier predictions of the radius of the trapped air pocket are confirmed. A boundary element method is used to consider air cushioning of an impact of an axisymmetric body into water. Efficient computational methods are obtained by analytically integrating the boundary integral equation over the azimuthal variable. The resulting numerically computed free-surface profiles predict an annular touchdown region in excellent agreement with the experiments.
Original languageEnglish
Pages (from-to)310-320
Number of pages11
JournalJournal of Fluid Mechanics
Volume695
Issue number-
Early online date14 Feb 2012
DOIs
Publication statusPublished - 25 Mar 2012

Fingerprint

Air cushioning
trapping
Boundary integral equations
air
Liquids
liquids
Boundary element method
Computational methods
Air
touchdown
axisymmetric bodies
Water
boundary element method
water
Fluids
integral equations
radii
fluids
Experiments
profiles

Keywords

  • bubble dynamics
  • gas/liquid flows

Cite this

Air trapping at impact of a rigid sphere onto a liquid. / Hicks, P.D.; Ermanyuk, E.V.; Gavrilov, N.V.; Purvis, R.

In: Journal of Fluid Mechanics, Vol. 695, No. -, 25.03.2012, p. 310-320.

Research output: Contribution to journalArticle

Hicks, PD, Ermanyuk, EV, Gavrilov, NV & Purvis, R 2012, 'Air trapping at impact of a rigid sphere onto a liquid', Journal of Fluid Mechanics, vol. 695, no. -, pp. 310-320. https://doi.org/10.1017/jfm.2012.20
Hicks, P.D. ; Ermanyuk, E.V. ; Gavrilov, N.V. ; Purvis, R. / Air trapping at impact of a rigid sphere onto a liquid. In: Journal of Fluid Mechanics. 2012 ; Vol. 695, No. -. pp. 310-320.
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