CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking
The motion of calcium alginate spheres in a liquid-solid fluidized bed is examined by radioactive particle tracking (RPT) and simulated by computational fluid dynamics coupled with discrete element method (CFD-DEM). Observables relevant for phenomenological models of the solid motion determined from...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p_Maestri http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p_Maestri |
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paper:paper_13858947_v_n_p_Maestri2023-06-08T16:12:47Z CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking CFD-DEM model Liquid inlet distribution Liquid-solid fluidization Radioactive particle tracking Calcium Dispersions Fluidization Fluidized beds Liquids Radioactive tracers Radioactivity Velocity Axial dispersion coefficients CFD-DEM Dispersion coefficient Liquid-solid fluidization Liquid-solid fluidized beds Phenomenological models Radioactive particle tracking Time-averaged velocity field Computational fluid dynamics The motion of calcium alginate spheres in a liquid-solid fluidized bed is examined by radioactive particle tracking (RPT) and simulated by computational fluid dynamics coupled with discrete element method (CFD-DEM). Observables relevant for phenomenological models of the solid motion determined from RPT are compared with those arising from the CFD-DEM simulations. Bed expansion, solid distribution, time averaged velocity fields and axial dispersion coefficients calculated from simulations reasonably agree with the experimental values. The influence of the liquid inlet distribution on simulations results is examined. A non-negligible effect is observed on the predicted velocity profiles, solid distribution and dispersion coefficients, mainly in the entrance region. Uniform liquid distribution at the entrance generally predicts a less steeped profile. When the liquid inlet distribution is parameterized considering the geometry of the experimental distributor, the fitting of the solid mean axial velocity and solid distribution radial profiles, judged from a sum of squares of relative errors, improves in 90% and 80%, respectively, compared to results obtained when considering a uniform liquid distribution at the entrance. © 2018 Elsevier B.V. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p_Maestri http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p_Maestri |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
CFD-DEM model Liquid inlet distribution Liquid-solid fluidization Radioactive particle tracking Calcium Dispersions Fluidization Fluidized beds Liquids Radioactive tracers Radioactivity Velocity Axial dispersion coefficients CFD-DEM Dispersion coefficient Liquid-solid fluidization Liquid-solid fluidized beds Phenomenological models Radioactive particle tracking Time-averaged velocity field Computational fluid dynamics |
| spellingShingle |
CFD-DEM model Liquid inlet distribution Liquid-solid fluidization Radioactive particle tracking Calcium Dispersions Fluidization Fluidized beds Liquids Radioactive tracers Radioactivity Velocity Axial dispersion coefficients CFD-DEM Dispersion coefficient Liquid-solid fluidization Liquid-solid fluidized beds Phenomenological models Radioactive particle tracking Time-averaged velocity field Computational fluid dynamics CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| topic_facet |
CFD-DEM model Liquid inlet distribution Liquid-solid fluidization Radioactive particle tracking Calcium Dispersions Fluidization Fluidized beds Liquids Radioactive tracers Radioactivity Velocity Axial dispersion coefficients CFD-DEM Dispersion coefficient Liquid-solid fluidization Liquid-solid fluidized beds Phenomenological models Radioactive particle tracking Time-averaged velocity field Computational fluid dynamics |
| description |
The motion of calcium alginate spheres in a liquid-solid fluidized bed is examined by radioactive particle tracking (RPT) and simulated by computational fluid dynamics coupled with discrete element method (CFD-DEM). Observables relevant for phenomenological models of the solid motion determined from RPT are compared with those arising from the CFD-DEM simulations. Bed expansion, solid distribution, time averaged velocity fields and axial dispersion coefficients calculated from simulations reasonably agree with the experimental values. The influence of the liquid inlet distribution on simulations results is examined. A non-negligible effect is observed on the predicted velocity profiles, solid distribution and dispersion coefficients, mainly in the entrance region. Uniform liquid distribution at the entrance generally predicts a less steeped profile. When the liquid inlet distribution is parameterized considering the geometry of the experimental distributor, the fitting of the solid mean axial velocity and solid distribution radial profiles, judged from a sum of squares of relative errors, improves in 90% and 80%, respectively, compared to results obtained when considering a uniform liquid distribution at the entrance. © 2018 Elsevier B.V. |
| title |
CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| title_short |
CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| title_full |
CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| title_fullStr |
CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| title_full_unstemmed |
CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| title_sort |
cfd-dem modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p_Maestri http://hdl.handle.net/20.500.12110/paper_13858947_v_n_p_Maestri |
| _version_ |
1768543050354655232 |