CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics
The hydrodynamic behaviour of air-glass beads bubbling fluidized bed reactor containing spherical glass beads is numerically studied, using OpenFoam v7 CFD software. Both Gidaspow and Syamlal-O'Brien drag models are used to calculate momentum exchange coefficients. Simulation predictions of pre...
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| Format: | Article |
| Language: | English |
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Isfahan University of Technology
2023-07-01
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| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | https://www.jafmonline.net/article_2260_4213f7688eb971d2b3a38f524f8558e8.pdf |
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| author | S. Aboudaoud S. Touzani S. Abderafi A. Cheddadi |
| author_facet | S. Aboudaoud S. Touzani S. Abderafi A. Cheddadi |
| author_sort | S. Aboudaoud |
| collection | DOAJ |
| description | The hydrodynamic behaviour of air-glass beads bubbling fluidized bed reactor containing spherical glass beads is numerically studied, using OpenFoam v7 CFD software. Both Gidaspow and Syamlal-O'Brien drag models are used to calculate momentum exchange coefficients. Simulation predictions of pressure loss, bed expansion rate, and air volume fraction parameters were compared and validated using data, existing in the literature obtained experimentally and performed by other numerical softwares. Pressure loss and rate of bed expansion were calculated with relative root mean square error (RMSE) equal to 0.65 and 0.095 respectively; Syamlal-O'Brien model is considered more accurate than Gidaspow model. Hence, numerical model reliability developed on OpenFoam was also proved. The hydrodynamic aspect study of the fluidized bed reactor was then performed, to analyse the impact of inlet air velocity (U) on particles motion. It was revealed that with U increment, air and glass beads axial velocities increase in the reactor centre and decrease in the sidewalls. Thus, a greater particle bed expansion is induced and the solid particles accumulated highly on the reactor sidewalls. In general, with the increase of U, the solid volume fraction decreases from 0.63 to 0.58 observed at 0.065 m/s and 0.51 m/s, respectively. |
| first_indexed | 2024-03-13T01:58:56Z |
| format | Article |
| id | doaj.art-0847366a0c7a4a40a37795a28b72d129 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 1735-3645 |
| language | English |
| last_indexed | 2024-03-13T01:58:56Z |
| publishDate | 2023-07-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-0847366a0c7a4a40a37795a28b72d1292023-07-02T07:41:51ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35721735-36452023-07-011691778179110.47176/jafm.16.09.17422260CFD Simulation of Air-Glass Beads Fluidized Bed HydrodynamicsS. Aboudaoud0S. Touzani1S. Abderafi2A. Cheddadi3Research team, Modeling of Energy Systems, Mechanical Materials and Structures, and Industrial Processes (MOSEM2PI), Mohammadia School of Engineers, Mohammed V University in Rabat, P. O. Box 765 Agdal, Rabat, MoroccoResearch team, Modeling of Energy Systems, Mechanical Materials and Structures, and Industrial Processes (MOSEM2PI), Mohammadia School of Engineers, Mohammed V University in Rabat, P. O. Box 765 Agdal, Rabat, MoroccoResearch team, Modeling of Energy Systems, Mechanical Materials and Structures, and Industrial Processes (MOSEM2PI), Mohammadia School of Engineers, Mohammed V University in Rabat, P. O. Box 765 Agdal, Rabat, MoroccoResearch team, Modeling of Energy Systems, Mechanical Materials and Structures, and Industrial Processes (MOSEM2PI), Mohammadia School of Engineers, Mohammed V University in Rabat, P. O. Box 765 Agdal, Rabat, MoroccoThe hydrodynamic behaviour of air-glass beads bubbling fluidized bed reactor containing spherical glass beads is numerically studied, using OpenFoam v7 CFD software. Both Gidaspow and Syamlal-O'Brien drag models are used to calculate momentum exchange coefficients. Simulation predictions of pressure loss, bed expansion rate, and air volume fraction parameters were compared and validated using data, existing in the literature obtained experimentally and performed by other numerical softwares. Pressure loss and rate of bed expansion were calculated with relative root mean square error (RMSE) equal to 0.65 and 0.095 respectively; Syamlal-O'Brien model is considered more accurate than Gidaspow model. Hence, numerical model reliability developed on OpenFoam was also proved. The hydrodynamic aspect study of the fluidized bed reactor was then performed, to analyse the impact of inlet air velocity (U) on particles motion. It was revealed that with U increment, air and glass beads axial velocities increase in the reactor centre and decrease in the sidewalls. Thus, a greater particle bed expansion is induced and the solid particles accumulated highly on the reactor sidewalls. In general, with the increase of U, the solid volume fraction decreases from 0.63 to 0.58 observed at 0.065 m/s and 0.51 m/s, respectively.https://www.jafmonline.net/article_2260_4213f7688eb971d2b3a38f524f8558e8.pdfcfd modellingeulerian-eulerian approachfluidized bed reactorhydrodynamicmultiphase flowopenfoam |
| spellingShingle | S. Aboudaoud S. Touzani S. Abderafi A. Cheddadi CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics Journal of Applied Fluid Mechanics cfd modelling eulerian-eulerian approach fluidized bed reactor hydrodynamic multiphase flow openfoam |
| title | CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics |
| title_full | CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics |
| title_fullStr | CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics |
| title_full_unstemmed | CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics |
| title_short | CFD Simulation of Air-Glass Beads Fluidized Bed Hydrodynamics |
| title_sort | cfd simulation of air glass beads fluidized bed hydrodynamics |
| topic | cfd modelling eulerian-eulerian approach fluidized bed reactor hydrodynamic multiphase flow openfoam |
| url | https://www.jafmonline.net/article_2260_4213f7688eb971d2b3a38f524f8558e8.pdf |
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