Numerical simulations of hydrodynamic behaviors in conical spouted beds--颗粒学报PARTICUOLOGY

Wang, Z. G., Bi, H. T., & Lim, C. J. (2006). Numerical simulations of hydrodynamic behaviors in conical spouted beds. China Particuology, 4(3), 194–203. https://doi.org/10.1016/S1672-2515(07)60261-9

Numerical simulations of hydrodynamic behaviors in conical spouted beds

Z.G. Wang ^a, H.T. Bi ^a *, C.J. Lim ^a

a Fluidization Research Centre, Department of Chemical and Biological Engineering, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada

10.1016/S1672-2515(07)60261-9

Volume 4, Issues 3–4, July 2006, Pages 194-203

Received 11 October 2005, Accepted 2 April 2006, Available online 27 November 2007.

E-mail: xbi@chml.ubc.ca

Highlights

Abstract

The axial and radial distributions of static pressures and vertical particle velocities of conical spouted beds have been simulated and compared with experimental data. Simulation results show that, among all factors investigated, the Actual Pressure Gradient (the APG term) in conical spouted beds, introduced as the default gravity term plus an empirical axial solid phase source term, has the most significant influence on static pressure profiles, followed by the restitution coefficient and frictional viscosity, while other factors almost have no effect. Apart from the solid bulk viscosity, almost all other factors affect the radial distribution of the axial particle velocity, although the influence of the APG term is less significant. For complex systems such as conical spouted beds where a fluidized spout region and a defluidized annulus region co-exist, the new term introduced in this work can improve the CFD simulation. Furthermore, for other systems with the Actual Pressure Gradient different from either fluidized beds or packed beds, the new approach can also be applied.

Graphical abstract

Keywords

conical spouted bed; hydrodynamics; numerical simulation; multiphase model

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