Air trapping at impact of a rigid sphere onto a liquid

Autor:	Evgeny V. Ermanyuk, Richard Purvis, Peter D. Hicks, N. V. Gavrilov
Rok vydání:	2012
Předmět:	Azimuth Materials science Mechanics of Materials Mechanical Engineering Free surface Rotational symmetry Cushioning Rigid sphere Radius Mechanics Condensed Matter Physics Boundary element method Antibubble
Zdroj:	Journal of Fluid Mechanics. 695:310-320
ISSN:	1469-7645 0022-1120
DOI:	10.1017/jfm.2012.20
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::95192955fb99a576617796362ab74c0e https://doi.org/10.1017/jfm.2012.20 Zobrazit plný text záznamu