期刊
COMPUTERS & MATHEMATICS WITH APPLICATIONS
卷 61, 期 12, 页码 3593-3605出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.camwa.2011.01.030
关键词
Lattice gas cellular automata; Gas/solid flow; Bubbling fluidized beds; Model
Modelling the hydrodynamics of gas/solid flow is important for the design and scale-up of fluidized bed reactors. A novel gas/solid dual-scale model based on lattice gas cellular automata (LGCA) is proposed to describe the macroscopic behaviour through microscopic gas-solid interactions. Solid particles and gas pseudo-particles are aligned in lattices with different scales for solid and gas. In addition to basic LGCA rules, additional rules for collision and propagation are specifically designed for gas-solid systems. The solid's evolution is then motivated by the temporal and spatial average momentum gained through solid-solid and gas-solid interactions. A statistical method, based on the similarity principle, is derived for the conversion between model parameters and hydrodynamic properties. Simulations for bubbles generated from a vertical jet in a bubbling fluidized bed based on this model agree well with experimental results, as well as with the results of two-fluid approaches and discrete particle simulations. (C) 2011 Elsevier Ltd. All rights reserved.
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