A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface
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 incid...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2013-08-01
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| Series: | Energies |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1996-1073/6/8/4288 |
| _version_ | 1798034645789442048 |
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| author | Hang Pu Jian Han Sufen Li Ming Dong |
| author_facet | Hang Pu Jian Han Sufen Li Ming Dong |
| author_sort | Hang Pu |
| collection | DOAJ |
| description | 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 (η) with the normal incident velocity (vin) can be roughly divided into the three parts. In the first part, η decreases with increasing vin. In the second part, η is little changed with increasing vin. In the third part, η rapidly increases with increasing vin. 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. |
| first_indexed | 2024-04-11T20:47:05Z |
| format | Article |
| id | doaj.art-61223b1fdf5b4aa1a948e7a3882cf6d4 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-11T20:47:05Z |
| publishDate | 2013-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-61223b1fdf5b4aa1a948e7a3882cf6d42022-12-22T04:04:00ZengMDPI AGEnergies1996-10732013-08-01684288430710.3390/en6084288A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar SurfaceHang PuJian HanSufen LiMing DongThe 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 (η) with the normal incident velocity (vin) can be roughly divided into the three parts. In the first part, η decreases with increasing vin. In the second part, η is little changed with increasing vin. In the third part, η rapidly increases with increasing vin. 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.http://www.mdpi.com/1996-1073/6/8/4288ash depositionenergy dissipationcontactimpactash particle |
| spellingShingle | Hang Pu Jian Han Sufen Li Ming Dong A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface Energies ash deposition energy dissipation contact impact ash particle |
| title | A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface |
| title_full | A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface |
| title_fullStr | A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface |
| title_full_unstemmed | A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface |
| title_short | A Dynamic Model for the Normal Impact of Fly Ash Particle with a Planar Surface |
| title_sort | dynamic model for the normal impact of fly ash particle with a planar surface |
| topic | ash deposition energy dissipation contact impact ash particle |
| url | http://www.mdpi.com/1996-1073/6/8/4288 |
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