Artículo
Kiared, K.; Larachi, F.; Cassanello, M.; Chaouki, J. "Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed" (1997) Industrial and Engineering Chemistry Research. 36(11):4695-4704
Estamos trabajando para incorporar este artículo al repositorio
Consulte la política de Acceso Abierto del editor
Abstract:
The motion of solids in a cylindrical liquid fluidized bed was experimentally characterized by means of a noninvasive radioactive particle tracking technique (RPT) for two monosized bed inventories, spherical glass beads (3 mm GB, density = 2500 kg/m3) and nonspherical poly-(vinyl chloride) particles (5.5 mm PVC, density = 1300 kg/m3). RPT-monitoring of a single radioactive solid tracer mimicking faithfully the characteristics of the solids revealed the detailed solids flow features by determining the tracer instantaneous 3-D Lagrangian trajectory and then its local instantaneous velocities. Transverse solids dispersion coefficients were an order of magnitude lower than their axial counterpart. Time, longitudinal, and circumferential averaging of local velocities in the fully developed region of the fluidized bed revealed a weak gulf streaming characterized by axial velocities positive (respectively negative) in the core and negative (respectively positive) near the vessel walls for the GBs (respectively for the PVCs). The measured mean circumferential ensemble-averaged radial velocity was essentially zero in the fully developed region. The solids flow turbulence field was anisotropic, but the less dense the particles, the closer to isotropy was the solids flow. Computed shear stress profiles showed that PVC particles exhibited a higher shear stress than GB particles. The dynamic solids flow structure inside a 3-D liquid fluidized bed can be viewed as a core-annulus structure with axially-dispersed plug-flow and radial dispersion in each of the upward and downward zones.
Registro:
| Documento: | Artículo |
| Título: | Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed |
| Autor: | Kiared, K.; Larachi, F.; Cassanello, M.; Chaouki, J. |
| Filiación: | Biopro Research Center, Department of Chemical Engineering, Ecl. Polytech. de Montréal, P.O. Box 6079, Montréal, Que. H3C 3A7, Canada Department of Chemical Engineering, CERPIC, Laval University, Que. G1K 7P4, Canada PINMATE, Departamento Industrias FCEyN, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina |
| Palabras clave: | Anisotropy; Flow patterns; Fluidized beds; Glass; Polyvinyl chlorides; Radioactive tracers; Shear stress; Turbulence; Velocity measurement; Lagrangian trajectory; Radioactive particle tracking (RPT) technique; Flow of fluids; flow field; fluidized bed; particle; solid flow |
| Año: | 1997 |
| Volumen: | 36 |
| Número: | 11 |
| Página de inicio: | 4695 |
| Página de fin: | 4704 |
| DOI: | http://dx.doi.org/10.1021/ie970161k |
| Título revista: | Industrial and Engineering Chemistry Research |
| Título revista abreviado: | Ind. Eng. Chem. Res. |
| ISSN: | 08885885 |
| CODEN: | IECRE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v36_n11_p4695_Kiared |
Referencias:
- Al-Dibouni, M.R., Garside, J., Particle Mixing and Classification in Liquid Fluidised Beds (1979) Trans. Inst. Chem. Eng., 57, p. 94
- Asif, M., Kalogerakis, N., Behie, L.A., Hydrodynamics of Liquid Fluidized Beds Including the Distributor Region (1992) Chem. Eng. Sci., 47, p. 4155
- Bascoul, A., Couderc, J.P., Delmas, H., Solids Movements in Liquid-Solid Fluidization (1993) Chem. Eng. J., 51, p. 135
- Carlos, C.R., Richardson, J.F., Solids Movement in Liquid Fluidized Beds - I Particle Velocity Distribution (1968) Chem. Eng. Sci., 23, p. 813
- Cassanello, M., Larachi, F., Marie, M.-N., Guy, C., Chaouki, J., Experimental Characterization of the Solid Phase Chaotic Dynamics in Three-Phase Fluidization (1995) Ind. Eng. Chem. Res., 34, p. 2971
- Degaleesan, S., (1997) Liquid Mixing and Turbulence in Bubble Columns, , D.Sc. Thesis, Washington University, St. Louis, MO
- Degaleesan, S., Roy, S., Kumar, S.B., Duduković, M.P., Liquid Mixing Based on Convection and Turbulent Dispersion in Bubble Columns (1996) Chem. Eng. Sci., 51, p. 1967
- Degaleesan, S., Duduković, M.P., Toseland, B.A., Bhatt, B.L., An Improved Mixing Model for Slurry Bubble Column Reactors (1997) Ind. Eng. Chem. Res., 36. , in press
- Devanathan, N., Moslemian, D., Duduković, M.P., Flow Mapping in Bubble Columns Using CARPT (1990) Chem. Eng. Sci., 45, p. 2285
- Di Felice, R., Hydrodynamics of Liquid Fluidisation (1995) Chem. Eng. Sci., 50, p. 1213
- Gbavčić, Z.B., Vuković, D.V., Zdanski, F.K., Tracer Particle Movement in a Two-Dimensional Water-Fluidized Bed (1990) Powder Technol., 62, p. 199
- Godfroy, L., Larachi, F., Kennedy, G., Chaouki, J., Simultaneous Measurement of the 3-D Position and Velocity of a Single Radioactive Particle in a CFB Riser at High Velocity (1996) Proceedings of CFB V, pp. MI2-1. , Beijing, China, May 28-June 1, Paper MI2
- Handley, D., Doraiswamy, A., Butcher, K.L., Franklin, N.L., A Study of the Fluid and Particle Mechanics in Liquid-Fluidised Beds (1966) Trans. Inst. Chem. Eng., 44, pp. T260
- Hanratty, T.J., Latinen, G., Wilhelm, R.H., Turbulent Diffusion in Particulately Fluidized Beds of Particles (1956) AIChE J., 2, p. 372
- Juma, A.K.A., Richardson, J.F., Segregation and Mixing in Liquid Fluidized Beds (1983) Chem. Eng. Sci., 38, p. 955
- Kang, Y., Nah, J.B., Min, B.T., Kim, S.D., Dispersion and Fluctuation of Fluidized Particles in a Liquid-Solid Fluidized Bed (1990) Chem. Eng. Commun., 97, p. 197
- Kmieć, A., Particle Distributions and Dynamics of Particle Movement in Liquid-Solid Fluidized Beds (1978) Chem. Eng. J., 15, p. 1
- Larachi, F., Kennedy, G., Chaouki, J., A γ-Ray Detection System for 3-D Particle Tracking in Multiphase Reactors (1994) Nucl. Instrum. Methods Phys. Res., Sect. A, 338, p. 568
- Larachi, F., Lord, E., Chaouki, J., Chavarie, C., Behie, L.A., Phenomenological Study of Solids Mixing in a Binary Liquid Fluidized Bed (1995) Proceedings of Fluidization VIII, pp. 385-392. , Tours, France
- Larachi, F., Cassanello, M., Chaouki, J., Guy, C., Flow Structure of the Solids in a Three-Dimensional Gas-Liquid-Solid Fluidized Bed (1996) AIChE J., 42, p. 2439
- Latif, B.A.J., Richardson, J.F., Circulation Patterns and Velocity Distribution for Particles in a Liquid Fluidised Bed (1972) Chem. Eng. Sci., 27, p. 1933
- Limtrakul, S., (1996) Hydrodynamics of Liquid Fluidized Beds and Gas-Liquid Fluidized Beds, , D.Sc. Thesis, Washington University, St. Louis, MO
- Lin, J.S., Chen, M.M., Chao, B.T., A Novel Radioactive Particle Tracking Facility for Measurement of Solids Motion in Gas Fluidized Beds (1985) AIChE J., 31, p. 465
- Mandelbrot, B.B., Wallis, J.R., Computer Experiments with Fractional Gaussian Noises. Part 2, Rescaled Ranges and Spectra (1969) Water Resour. Res., 5, p. 242
- Monin, A.S., Yaglom, A.M., (1971) Statistical Fluid Mechanics: Mechanics of Turbulence, 1. , Lumley, J. L., Ed.; MIT Press: Cambridge, MA
- Moslemian, D., (1987) Study of Solids Motion, Mixing, and Heat Transfer in Gas-Fluidized Beds, , Ph.D. Thesis, University of Illinois, Urbana-Champaign, IL
- Roy, D., Larachi, F., Legros, R., Chaouki, J., A Study of Solid Behavior in Spouted Beds Using 3-D Particle Tracking (1994) Can. J. Chem. Eng., 72, p. 945
- Volpicelli, G., Massimila, L., Zenz, F.A., Non-Homogeneities in Solid-Liquid Fluidization (1966) Chem. Eng. Prog. Symp. Ser., 62, p. 42
Citas:
---------- APA ----------
Kiared, K., Larachi, F., Cassanello, M. & Chaouki, J. (1997) . Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed. Industrial and Engineering Chemistry Research, 36(11), 4695-4704.http://dx.doi.org/10.1021/ie970161k
---------- CHICAGO ----------
Kiared, K., Larachi, F., Cassanello, M., Chaouki, J. "Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed" . Industrial and Engineering Chemistry Research 36, no. 11 (1997) : 4695-4704.http://dx.doi.org/10.1021/ie970161k
---------- MLA ----------
Kiared, K., Larachi, F., Cassanello, M., Chaouki, J. "Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed" . Industrial and Engineering Chemistry Research, vol. 36, no. 11, 1997, pp. 4695-4704.http://dx.doi.org/10.1021/ie970161k
---------- VANCOUVER ----------
Kiared, K., Larachi, F., Cassanello, M., Chaouki, J. Flow Structure of the Solids in a Three-Dimensional Liquid Fluidized Bed. Ind. Eng. Chem. Res. 1997;36(11):4695-4704.http://dx.doi.org/10.1021/ie970161k
