Air trapping at impact of a rigid sphere onto a liquid

Hicks, P. D., Ermanyuk, E. V., Gavrilov, N. V. and Purvis, R. (2012) Air trapping at impact of a rigid sphere onto a liquid. Journal of Fluid Mechanics, 695. pp. 310-320. ISSN 0022-1120

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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.

Item Type:	Article
Faculty \ School:	Faculty of Science > School of Mathematics (former - to 2024)
UEA Research Groups:	Faculty of Science > Research Groups > Fluid and Solid Mechanics (former - to 2024) Faculty of Science > Research Groups > Fluids & Structures
Depositing User:	Users 2731 not found.
Date Deposited:	29 Jan 2013 14:53
Last Modified:	28 Mar 2025 02:35
URI:	https://ueaeprints.uea.ac.uk/id/eprint/41029
DOI:	10.1017/jfm.2012.20

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