The Importance of 3D Mesh Generation for Large Eddy Simulation of Gas – Solid Turbulent Flows in a Fluidized Beds
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The Importance of 3D Mesh Generation for Large Eddy Simulation of Gas – Solid Turbulent Flows in a Fluidized Beds

Authors: G. González-Silva, E. M. Matos, W. P. Martignoni, M. Mori


The objective of this work is to show a procedure for mesh generation in a fluidized bed using large eddy simulations (LES) of a filtered two-fluid model. The experimental data were obtained by [1] in a laboratory fluidized bed. Results show that it is possible to use mesh with less cells as compared to RANS turbulence model with granular kinetic theory flow (KTGF). Also, the numerical results validate the experimental data near wall of the bed, which cannot be predicted by RANS.model.

Keywords: LES, Mesh, Gas-Solid, Fluidized bed

Digital Object Identifier (DOI):

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[1] .A. Samuelsberg, and B. H. Hjertager, "An experimental and numerical study of flow patterns in a circulating fluidized bed reactor." International Journal of Multiphase Flow 22 (3) (June): 575-591, 1996.
[2] D. Kunii, and O. Levenspiel, "Fluidization engineering". 2nd ed. Boston Mass.: Butterworth-Heinemann, 1991
[3] E S. Tavoulareas, "FluidizedÔÇÉBed Combustion Technology." Annual Review of Energy and the Environment 16 (1) (November): 25ÔÇÉ57. 1991.
[4] J. Ancheyta, "Modeling and simulation of catalytic reactors for petroleum refining". Oxford: Wiley-Blackwell, 2010.
[5] G. S. Gonzalez,, 2008. "Modeling and simulation of cocurrent downflow reactor (Downer)". Master-s thesis, Campinas, Brazil: University of Campinas.
[6] Y. Cheng, W. Changning, Z. Jingxu, Fei Wei, and Yong Jin. "Downer reactor: From fundamental study to industrial application." Powder Technology 183 (3) (April 21), 2008.
[7] J. K. Eaton and J. R. Fessler. Preferential concentration of particles by turbulence. International Journal of Multiphase Flow, 20(Supplement 1):169-209, August 1994.
[8] Kulick Jd, Fessler Jr, and Eaton Jk. Title: particle response and turbulence modification in fully-developed channel flow author(s): kulick jd, fessler jr, eaton jk source: journal of fluid mechanics 277: 109- 134 oct 25 1994. journal of fluid mechanics, 277:109-134, 1994
[9] J.W. Deardorff, "Three-dimensional numerical study of the height and mean structure of a heated planetary boundary layer." Boundary-Layer Meteorology 7 (1) (August), 1974.
[10] DK Lilly,. The representation of small scale turbulence in numerical simulation experiments. In IBM Scientific Computing Symposium on environmental sciences, 195-210, 1967.
[11] J. Smagorinsky. "General circulation experiments with the primitive equations". Monthly Weather Review, 91(3):99-164, March 1963.
[12] Liu Han-Tao,Chang Jian-Zhong,An Kang et al. "Direct numerical simulation of the sedimentation of two particles with thermal convection". Acta Phys. Sin., 2010, 59(3): 1883-1883.
[13] K. Agrawal, P N. Loezos, M Syamlal, and S Sundaresan. "The role of meso-scale structures in rapid gas-solid flows". Journal of Fluid Mechanics, 445:-185.
[14] I. C. Georg,. "Modelagem e simula├º├úo numérica tridimensional transiente do escoamento g├ís-s├│lido em um reator de craqueamento catal├¡tico em leito fluidizado" PhD diss., Florian├│polis: Universidade Federal de Santa Catarina. 2005.
[15] CY Yang, and U Lei. "The role of the turbulent scales in the settling velocity of heavy particles in homogeneous isotropic turbulence." J. Fluid Mech. 371: 179-205, 1998.
[16] J. R Fessler, and John K. Eaton. "Turbulence modification by particles in a backward-facing step flow." Journal of Fluid Mechanics 394 (September): 97-117. 1999.
[17] A. M., Ahmed, and S. Elghobashi "On the mechanisms of modifying the structure of turbulent homogeneous shear flows by dispersed particles." Physics of Fluids 12: 2906, 2000.
[18] van Wachem B.G.M.. Derivation, Implementation, and Validation of Computer Simulation Models for Gas-Solid Fluidized Beds. Ph.D. Thesis, Delft University of Technology, 2000
[19] P N Andrews,. Loezos, and Sankaran Sundaresan. "Coarse-Grid Simulation of Gas-Particle Flows in Vertical Risers." Industrial & Engineering Chemistry Research 44 (16): 6022-6037. 2005.
[20] Y. A. Igci, S Sundaresan, S Pannala, and T O-Brien. "Filtered two-fluid models for fluidized gas-particle suspensions." AIChE Journal 54 (6): 1431-1448. 2008.
[21] W. Holloway, B Sofiane, Christine M. Hrenya, and Sankaran Sundaresan. 2011. "Meso-scale structures of bidisperse mixtures of particles fluidized by a gas." Chemical Engineering Science 66 (19) (October 1): 4403-4420.
[22] D. GeldartGas, "Fluidization technology". Chichester, New York: Wiley, 1986.
[23] A. Leonard. Energy cascade in large-eddy simulations of turbulent fluid flows. In Turbulent diffusion in environmental pollution; Proceedings of the Second Symposium, Charlottesville, Va., April 8-14, 1973. Volume A. (A75-30951 13-47) New York, Academic Press, Inc., 1974, p. 237- 248. NASA-supported research., volume 75, pages 237-248, 1974.
[24] S., Ghosal, and P. Moin, "The Basic Equations for the Large Eddy Simulation of Turbulent Flows in Complex Geometry." Journal of Computational Physics 118 (1) (April): 24-37, 1995
[25] van Driest, E. R. "On the turbulent flow near a wall." J. Aero. Sci. 23: 1007-1011, 1956
[26] B. Vreman, B. Geurts, and J. G. M. Kuerten. ÔÇÿLarge-eddy simulation of the turbulent mixing layer-. J. Fluid Mech., 339:357-390, 1997.
[27] F. K. Chow and P. Moin, "A further study of numerical errors in largeeddy simulations," Journal of Computational Physics, vol. 184, no. 2, pp. 366-380, 2003
[28] Hodapp. "Modeling and simulation of a fluidized bed : a comparative study". Master-s thesis, Campinas, Brazil: University of Campinas, 2009.
[29] A. Miller, Aubre, and D. Gidaspow, "Dense, vertical gasÔÇÉsolid flow in a pipe." AIChE Journal 38 (11): 1801-1815, 1992.
[30] L. Huilin and D. Gidaspow, "Hydrodynamics of binary fluidization in a riser: CFD simulation using two granular temperatures", Chemical Engineering Science, n.58, p.3777-3792, 2003.
[31] M. Rudman and H. M. Blackburn, Large eddy simulation of turbulent pipe flow. 2 International Conference on CFD in the Minerals and Process Industries, CSIRO, Melborne, Australia 6−8, 503, 1999
[32] U. Plomelli, "Wall layer models for LES". 46th AIAA Aerospace Sciences Meeting and Exhibit 7 - 10 January 2008, Reno, Nevada
[33] U. Piomelli, and J. Liu, "Large-eddy simulation of rotating channel flow using a localized dynamic model". Phys. Fluids 7, 839-848, 1995.
[34] U. Piomelli, A.,Scotti, E. Balaras, Large-eddy simulation of turbulent flows from desktop to supercomputer, Proceeding of the Fourth International Conference on Vector and Parallel Processing vol. 3, Springer (2000).