DEM/CFD Simulations of a Pseudo-2D Fluidized Bed: Comparison with Experiments
| Autor: | Jean-Lou Pierson, Ziad Hamidouche, Vincent Moureau, Rim Brahem, Ghislain Lartigue, Yann Dufresne |
|---|---|
| Přispěvatelé: | IFP Energies nouvelles (IFPEN), Complexe de recherche interprofessionnel en aérothermochimie (CORIA), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS), ANR-14-CE05-0042,MORE4LESS,Modélisation des écoulements particulaires réactifs pour les procédés durables à faible impact énergétique(2014) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology Slip (materials science) Computational fluid dynamics lcsh:Thermodynamics 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics fluidized beds symbols.namesake [SPI]Engineering Sciences [physics] [CHIM.GENI]Chemical Sciences/Chemical engineering lcsh:QC310.15-319 0103 physical sciences Mathematics::Symplectic Geometry lcsh:QC120-168.85 Fluid Flow and Transfer Processes Mesoscopic physics business.industry Mechanical Engineering Reynolds number Mechanics DEM/CFD simulations Solver 021001 nanoscience & nanotechnology Condensed Matter Physics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Discrete element method frictional effects Fluidized bed symbols lcsh:Descriptive and experimental mechanics Liquid bubble Euler/Lagrange approach 0210 nano-technology business |
| Zdroj: | Fluids Fluids, MDPI, 2019, 4 (1), pp.51. ⟨10.3390/fluids4010051⟩ Volume 4 Issue 1 Fluids, Vol 4, Iss 1, p 51 (2019) |
| ISSN: | 2311-5521 |
| Popis: | The present work investigates the performance of a mesoscopic LaGrangian approach for the prediction of gas&ndash particle flows under the influence of different physical and numerical parameters. To this end, Geldart D particles with 1 mm diameter and density of 2500 kg/m 3 are simulated in a pseudo-2D fluidized bed using a Discrete Element Method (DEM)/Large-Eddy Simulation (LES) solver called YALES2. Time-averaged quantities are computed and compared with experimental results reported in the literature. A mesh sensitivity analysis showed that better predictions regarding the particulate phase are achieved when the mesh is finer. This is due to a better description of the local and instantaneous gas&ndash particle interactions, leading to an accurate prediction of the particle dynamics. Slip and no-slip wall conditions regarding the gas phase were tested and their effect was found negligible for the simulated regimes. Additional simulations showed that increasing either the particle&ndash particle or the particle&ndash wall friction coefficients tends to reduce bed expansion and to initiate bubble formation. A set of friction coefficients was retained for which the predictions were in good agreement with the experiments. Simulations for other Reynolds number and bed weight conditions are then carried out and satisfactory results were obtained. |
| Databáze: | OpenAIRE |
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