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Abstract:

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.

Registro:

Documento: Artículo
Título:CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking
Autor:Maestri, M.; Salierno, G.; Piovano, S.; Cassanello, M.; Cardona, M.A.; Hojman, D.; Somacal, H.
Filiación:Laboratorio de Reactores y Sistemas para la Industria–LARSI, Dep. Industrias, FCEyN, Universidad de Buenos Aires, Int. Güiraldes 2620, Buenos Aires, C1428BGA, Argentina
Laboratorio de Diagnóstico por Radiaciones–LaDiR, Dep. Física Experimental, Comisión Nacional de Energía Atómica (CNEA), San Martín, Buenos Aires, Argentina
Palabras clave: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
Año:2018
DOI: http://dx.doi.org/10.1016/j.cej.2018.11.037
Título revista:Chemical Engineering Journal
Título revista abreviado:Chem. Eng. J.
ISSN:13858947
CODEN:CMEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_13858947_v_n_p_Maestri

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Citas:

---------- APA ----------
Maestri, M., Salierno, G., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D. & Somacal, H. (2018) . CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking. Chemical Engineering Journal.
http://dx.doi.org/10.1016/j.cej.2018.11.037
---------- CHICAGO ----------
Maestri, M., Salierno, G., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. "CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking" . Chemical Engineering Journal (2018).
http://dx.doi.org/10.1016/j.cej.2018.11.037
---------- MLA ----------
Maestri, M., Salierno, G., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. "CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking" . Chemical Engineering Journal, 2018.
http://dx.doi.org/10.1016/j.cej.2018.11.037
---------- VANCOUVER ----------
Maestri, M., Salierno, G., Piovano, S., Cassanello, M., Cardona, M.A., Hojman, D., et al. CFD-DEM modeling of solid motion in a water-calcium alginate fluidized column and its comparison with results from radioactive particle tracking. Chem. Eng. J. 2018.
http://dx.doi.org/10.1016/j.cej.2018.11.037