Abstract
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.
Original language | English |
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Pages (from-to) | 198003-1-198003-4 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 93 |
Issue number | 19 |
DOIs | |
Publication status | Published - 2004 |
Keywords
- METIS-221017
- IR-49050