CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model
Particle adhesion is of great importance to coating processes due to its effect on fluidization. Currently, Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) has become a powerful tool for the study of multiphase flows. Various contact force models have also been proposed. However, part...
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| Format: | Article |
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MDPI AG
2021-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/8/2276 |
| _version_ | 1827694791171768320 |
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| author | Zhao Chen Lin Jiang Mofan Qiu Meng Chen Rongzheng Liu Malin Liu |
| author_facet | Zhao Chen Lin Jiang Mofan Qiu Meng Chen Rongzheng Liu Malin Liu |
| author_sort | Zhao Chen |
| collection | DOAJ |
| description | Particle adhesion is of great importance to coating processes due to its effect on fluidization. Currently, Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) has become a powerful tool for the study of multiphase flows. Various contact force models have also been proposed. However, particle dynamics in high temperature will be changed with particle surface properties changing. In view of this, an adhesion model is developed based on approaching-loading-unloading-detaching idea and particle surface change under high temperature in this paper. Analyses of the adhesion model are given through two particle collision process and validated by experiment. Effects of inlet gas velocity and adhesion intensity on spouted bed dynamics are investigated. It is concluded that fluidization cycle will be accelerated by adhesion, and intensity of fluidization will be marginally enhanced by slight adhesion. Within a certain range, increasing inlet gas velocity will lead to strong intensity of particle motion. A parameter sensitivity comparison of linear spring-damping model and Hertz-Mindlin Model is given, which shows in case of small overlaps, forces calculated by both models have little distinction, diametrically opposed to that of large overlaps. |
| first_indexed | 2024-03-10T12:12:45Z |
| format | Article |
| id | doaj.art-a23491013a154539a7c9d01b8d648e90 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T12:12:45Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a23491013a154539a7c9d01b8d648e902023-11-21T16:06:04ZengMDPI AGEnergies1996-10732021-04-01148227610.3390/en14082276CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive ModelZhao Chen0Lin Jiang1Mofan Qiu2Meng Chen3Rongzheng Liu4Malin Liu5Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaInstitute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, ChinaParticle adhesion is of great importance to coating processes due to its effect on fluidization. Currently, Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) has become a powerful tool for the study of multiphase flows. Various contact force models have also been proposed. However, particle dynamics in high temperature will be changed with particle surface properties changing. In view of this, an adhesion model is developed based on approaching-loading-unloading-detaching idea and particle surface change under high temperature in this paper. Analyses of the adhesion model are given through two particle collision process and validated by experiment. Effects of inlet gas velocity and adhesion intensity on spouted bed dynamics are investigated. It is concluded that fluidization cycle will be accelerated by adhesion, and intensity of fluidization will be marginally enhanced by slight adhesion. Within a certain range, increasing inlet gas velocity will lead to strong intensity of particle motion. A parameter sensitivity comparison of linear spring-damping model and Hertz-Mindlin Model is given, which shows in case of small overlaps, forces calculated by both models have little distinction, diametrically opposed to that of large overlaps.https://www.mdpi.com/1996-1073/14/8/2276CFD-DEMadhesiontemperaturehead-on collision |
| spellingShingle | Zhao Chen Lin Jiang Mofan Qiu Meng Chen Rongzheng Liu Malin Liu CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model Energies CFD-DEM adhesion temperature head-on collision |
| title | CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model |
| title_full | CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model |
| title_fullStr | CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model |
| title_full_unstemmed | CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model |
| title_short | CFD-DEM Simulation of Spouted Bed Dynamics under High Temperature with an Adhesive Model |
| title_sort | cfd dem simulation of spouted bed dynamics under high temperature with an adhesive model |
| topic | CFD-DEM adhesion temperature head-on collision |
| url | https://www.mdpi.com/1996-1073/14/8/2276 |
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