Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model
This paper presents a numerical study of the gas fluidization of a mixture of 45,000 cohesive and cohesionless particles (D=100 μm and ρ=1,440 kgm−3) using a Combined Continuum and Discrete Model (CCDM). In such a model, the...
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| Format: | Article |
| Language: | English |
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Hosokawa Powder Technology Foundation
2014-03-01
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| Series: | KONA Powder and Particle Journal |
| Online Access: | https://www.jstage.jst.go.jp/article/kona/21/0/21_2003013/_pdf/-char/en |
| _version_ | 1818591699433160704 |
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| author | Bao Hua Xu |
| author_facet | Bao Hua Xu |
| author_sort | Bao Hua Xu |
| collection | DOAJ |
| description | This paper presents a numerical study of the gas fluidization of a mixture of 45,000 cohesive and cohesionless particles (D=100 μm and ρ=1,440 kgm−3) using a Combined Continuum and Discrete Model (CCDM). In such a model, the motion of individual particles is obtained by solving Newton’s second law of motion and flow of continuum fluid by the local averaged Navier-Stokes equations. In this work, the cohesion among particles is caused by van der Waals interactions. The Hamaker constants are used to distinguish the cohesivity among particles so that finite values are assigned to cohesive particles and zero values to cohesionless particles. It is shown that the presence of cohesionless particles in an assembly of cohesive particles can improve their flowability and that sustainable fluidization can be achieved if the amount of cohesionless particles is sufficient. |
| first_indexed | 2024-12-16T10:16:35Z |
| format | Article |
| id | doaj.art-7570c3e2dd4c4e0ba7965f4f20ed8aff |
| institution | Directory Open Access Journal |
| issn | 0288-4534 2187-5537 |
| language | English |
| last_indexed | 2024-12-16T10:16:35Z |
| publishDate | 2014-03-01 |
| publisher | Hosokawa Powder Technology Foundation |
| record_format | Article |
| series | KONA Powder and Particle Journal |
| spelling | doaj.art-7570c3e2dd4c4e0ba7965f4f20ed8aff2022-12-21T22:35:25ZengHosokawa Powder Technology FoundationKONA Powder and Particle Journal0288-45342187-55372014-03-0121010010810.14356/kona.2003013konaModelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete modelBao Hua Xu0Institute of Particle Science and Engineering, School of Process, Environmental and Materials Engineering, University of LeedsThis paper presents a numerical study of the gas fluidization of a mixture of 45,000 cohesive and cohesionless particles (D=100 μm and ρ=1,440 kgm−3) using a Combined Continuum and Discrete Model (CCDM). In such a model, the motion of individual particles is obtained by solving Newton’s second law of motion and flow of continuum fluid by the local averaged Navier-Stokes equations. In this work, the cohesion among particles is caused by van der Waals interactions. The Hamaker constants are used to distinguish the cohesivity among particles so that finite values are assigned to cohesive particles and zero values to cohesionless particles. It is shown that the presence of cohesionless particles in an assembly of cohesive particles can improve their flowability and that sustainable fluidization can be achieved if the amount of cohesionless particles is sufficient.https://www.jstage.jst.go.jp/article/kona/21/0/21_2003013/_pdf/-char/en |
| spellingShingle | Bao Hua Xu Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model KONA Powder and Particle Journal |
| title | Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| title_full | Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| title_fullStr | Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| title_full_unstemmed | Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| title_short | Modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| title_sort | modelling of the gas fluidization of a mixture of cohesive and cohesionless particles by a combined continuum and discrete model |
| url | https://www.jstage.jst.go.jp/article/kona/21/0/21_2003013/_pdf/-char/en |
| work_keys_str_mv | AT baohuaxu modellingofthegasfluidizationofamixtureofcohesiveandcohesionlessparticlesbyacombinedcontinuumanddiscretemodel |