Impact on Soft Sand: Void Collapse and Jet Formation

Autor:	Ko van der Weele, Hans Kuipers, C. Zeilstra, Devaraj van der Meer, Detlef Lohse, René Mikkelsen, Raymond Bergmann, Martin Anton van der Hoef, Michel Versluis
Přispěvatelé:	Faculty of Science and Technology, Physics of Fluids
Rok vydání:	2004
Předmět:	Gas bubble Physics Splash METIS-229886 General Physics and Astronomy Mechanics IR-49050 Granular material Steel ball Physics::Fluid Dynamics Classical mechanics METIS-221017 Impact crater Ball (bearing) Discrete particle Air bubble
Zdroj:	Physical review letters, 93(19). American Physical Society 5th International Conference on Micromechanics of Granular Media, Powders and Grains 2005 Scopus-Elsevier
ISSN:	1079-7114 0031-9007
DOI:	10.1103/physrevlett.93.198003
Popis:	Very fine sand is prepared in a well-defined and fully decompactified state by letting gas bubble through it. After turning off the gas stream, a steel ball is dropped on the sand. On impact of the ball, sand is blown away in all directions ("splash") and an impact crater forms. When this cavity collapses, a granular jet emerges and is driven straight into the air. A second jet goes downwards into the air bubble entrained during the process, thus pushing surface material deep into the ground. The air bubble rises slowly towards the surface, causing a granular eruption. In addition to the experiments and the discrete particle simulations we present a simple continuum theory to account for the void collapse leading to the formation of the upward and downward jets.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f3bc803a320fb5e38d0fb98f8eda1635 https://doi.org/10.1103/physrevlett.93.198003 Zobrazit plný text záznamu