Abstract
We present results from an experimental study of granular impact using a combination of high-speed video and positron emission particle tracking (PEPT). The PEPT technique exploits the annihilation of photons from positron decay to determine the position of tracer particles either inside a small granular bed or attached to the object which impacts the bed. We use dense spheres as impactors and the granular beds are comprised of glass beads which are fluidised to achieve a range of different initial packing states. For the first time, we have simultaneously investigated both the trajectory of the sphere, the motion of particles in a 3-D granular bed and particles which jump into the resultant jet, which arises from the collapse of the cavity formed by the impacting sphere.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 284-288 |
| Number of pages | 5 |
| Journal | Powder Technology |
| Volume | 274 |
| DOIs | |
| State | Published - Apr 2015 |
Bibliographical note
KAUST Repository Item: Exported on 2020-10-01Acknowledged KAUST grant number(s): 7000000024
Acknowledgements: This work was partially supported by an Academic Excellence Alliance grant awarded by the KAUST Office of Competitive Research Funds number 7000000024. The experimental work was conducted whilst J.O.M. was on a research visit to the University of Birmingham. The authors thank Andy Ingram for the assistance and advice with the experimental setup, and Thomas Leadbeater, Joseph Gargiuli and Dave Parker for assisting with the experiments and analysis.
ASJC Scopus subject areas
- General Chemical Engineering