“Modeling and Simulation of a lab-scale Fluidised Bed”

Authors: Britt Halvorsen and Vidar Mathiesen,
Affiliation: Telemark University College and Telemark Technological R&D Centre (Tel-Tek)
Reference: 2002, Vol 23, No 2, pp. 117-133.

Keywords: CFD, gas/particle flow, bubble formation, granular temperature

Abstract: The flow behaviour of a lab-scale fluidised bed with a central jet has been simulated. The study has been performed with an in-house computational fluid dynamics (CFD) model named FLOTRACS-MP-3D. The CFD model is based on a multi-fluid Eulerian description of the phases, where the kinetic theory for granular flow forms the basis for turbulence modelling of the solid phases. A two-dimensional Cartesian co-ordinate system is used to describe the geometry. This paper discusses whether bubble formation and bed height are influenced by coefficient of restitution, drag model and number of solid phases. Measurements of the same fluidised bed with a digital video camera are performed. Computational results are compared with the experimental results, and the discrepancies are discussed.

PDF PDF (1635 Kb)        DOI: 10.4173/mic.2002.2.3

References:
[1] DEARDORFF, J.W. (1971). On the Magnitude of Subgrid Scale Eddy Coefficient, Journal of Computational Physics, 7, 120-133.
[2] DING, J. GIDASPOW, D. (1990). Bubbling fluidization model using kinetic theory of granular flow, AIChE Journal, 3.4, 523-538 doi:10.1002/aic.690360404
[3] GIDASPOW, D. (1994). Multiphase Flow and Fluidization, Academic Press, Boston.
[4] GOLDSCHMIDT, M.J.V., KUIPERS, J.A.M. VAN SWAAIJ, W.P.M. (2001). Hydrodynamic modelling of dense gas-fluidised beds using the kinetic theory of granular flow: effect of coefficient of restitution on bed dynamics, Chemical Engineering Science, 56, 571-578.
[5] KUIPERS, J.A.M. VAN DUIN, K.J. VAN BECKUM, F.P.H. VAN SWAAIJ, W.P.M. (1991). A Numerical model of gas fluidized beds, Chemical Engineering Science, 47(8), 1913-1924. 1992 doi:10.1016/0009-2509(92)80309-Z
[6] MA, D. AHMADI, G. (1986). An equation of state for dense rigid sphere gases, Journal of Chemical Physics, 8.6, 3449-3450 doi:10.1063/1.450229
[7] MANGER, E. (1996). Modelling and simulation of gas/solid flow in curvilinear coordinates, Ph.D. thesis, Telemark Institute of Technology, Norway.
[8] MATHIESEN, V., SOLBERG, T. HJERTAGER, B. H. (2000). Prediction of gas/particle flow including a realistic particle size distribution, Powder Technology 112, 34-45 doi:10.1016/S0032-5910(99)00303-4
[9] MATHIESEN, V., SOLBERG, T. HJERTAGER, B.H. (2000). An experimental and computational study of multiphase flow behavior in a circulating fluidized bed, Int. Journal of Multiphase Flow, 26(3), 387-419 doi:10.1016/S0301-9322(99)00027-0
[10] MATHIESEN, V (2000). Flow Modeling of an Industrial Fluidized Bed Reactor, AlChE Annual Meeting, Los Angeles, Nov. 12-17, 2000, CFD and its application to fluid-particle systems.
[11] YAKHOT, Y. ORSZAG, S.A. (1986). Renormalization group analysis of turbulence, Part 1: basis theory. Journal of Scientific Computing, .1, 3- 51 doi:10.1007/BF01061452


BibTeX:
@article{MIC-2002-2-3,
  title={{Modeling and Simulation of a lab-scale Fluidised Bed}},
  author={Halvorsen, Britt and Mathiesen, Vidar},
  journal={Modeling, Identification and Control},
  volume={23},
  number={2},
  pages={117--133},
  year={2002},
  doi={10.4173/mic.2002.2.3},
  publisher={Norwegian Society of Automatic Control}
};