- Title
- Energy dissipation on agglomerates during impact
- Creator
- Moreno-Atanasio, Roberto
- Relation
- CHEMECA 2009 Conference. CHEMECA 2009: Engineering Our Future: Are We Up to the Challenge?: CD with Proceedings (Perth, W.A. 27-30 September, 2009)
- Relation
- http://www.icms.com.au/chemeca2009/abstract/400.asp
- Publisher
- Engineers Australia
- Resource Type
- conference paper
- Date
- 2009
- Description
- This work presents the computational analysis of the energy propagated and dissipated in agglomerates whilst impacting against a rigid target. Computer simulations were carried out using Discrete Element Method (DEM). One agglomerate made of 3000 spherical cohesive particles of 100 micrometers in diameter was impacted against a wall at velocities between 0.02 and 4 m/s. The cohesion between particles was simulated using the model of Johnson, Kendall and Roberts (1971). The curve of the final kinetic energy of the agglomerate versus incident kinetic energy shows a minimum which coincides with the minimum value of kinetic energy required to produce the agglomerate fragmentation (transition between a 'quasi-elastic' and a 'fragmentation' regime). A comparison of the energy dissipated by breakage of individual interparticle contacts with the net loss kinetic energy shows that contact breakage is only responsible for a small part of the energy dissipated in the system and therefore, most energy is consumed by contact friction and damping between the individual particles forming the agglomerate.
- Subject
- Discrete Element Method; agglomerate; impact; energy dissipation; cohesion
- Identifier
- uon:9069
- Identifier
- http://hdl.handle.net/1959.13/920094
- Identifier
- ISBN:9780858259225
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