A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface

Ming Dong, Jian Han, Sufen Li and Hang Pu
Additional contact information
Ming Dong: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Jian Han: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Sufen Li: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China
Hang Pu: School of Energy and Power Engineering, Dalian University of Technology, Dalian 116024, China

Energies, 2013, vol. 6, issue 8, 1-20

Abstract: The rebound behavior of fly ash particles normally impacting a planar surface is investigated by using a dynamic model. The three forms of soft sphere physical model are obtained using static/quasi-static contact mechanics and energy dissipation theory. The influences of the particle size, the incident velocity of the particle on the damping coefficient and the impact contact time are all examined. We also predict the critical velocity for three particle sizes. It is found that the variation of the damping coefficient (?) with the normal incident velocity ( v in ) can be roughly divided into the three parts. In the first part, ? decreases with increasing v in . In the second part, ? is little changed with increasing v in . In the third part, ? rapidly increases with increasing v in . For smaller impact velocities, the viscoelastic effect plays a dominant role in the impact process, while for higher incident velocities; the energy dissipation depends mainly on plastic deformation. In addition, the critical velocity shows a distinct dependence on the particle size. Finally, the contact displacement-contact time curves are examined. The work provides a solid basis for the development of a discrete-element-method approach to study ash deposition.

Keywords: ash deposition; energy dissipation; contact; impact; ash particle (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.mdpi.com/1996-1073/6/8/4288/pdf (application/pdf)
https://www.mdpi.com/1996-1073/6/8/4288/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:6:y:2013:i:8:p:4288-4307:d:28141

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().