计算物理 ›› 2011, Vol. 28 ›› Issue (5): 705-712.

• 研究论文 • 上一篇    下一篇

鼓泡床内气固两相流的变尺度格子气模拟

林亮成1, 郑忠1, 张晋1, 陈伟1, 李东耀2   

  1. 1. 重庆大学材料科学与工程学院, 重庆 400044;
    2. 中国电力工程顾问集团东北电力设计院, 长春 130021
  • 收稿日期:2010-09-16 修回日期:2011-01-11 出版日期:2011-09-25 发布日期:2011-09-25
  • 作者简介:林亮成(1981-),男,山西朔州,博士生,主要从事气固两相流的模拟和实验研究,E-mail:liangchenglin2009@gmail.com
  • 基金资助:
    教育部留学回国人员科研启动基金项目(教外司留[2008]890-10)资助项目

Simulation of Gas-Solid Two-Phase Flow in a Bubbling Fluidized Bed with Variable.Scale Lattice Gas Automata

LIN Liangcheng1, ZHENG Zhong1, ZHANG Jin1, CHEN Wei1, LI Dongyao2   

  1. 1. College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
    2. Northeast Electric Power Design Institute of China Power Engineering Consulting Group, Changchun 130021, China
  • Received:2010-09-16 Revised:2011-01-11 Online:2011-09-25 Published:2011-09-25

摘要: 基于格子气自动机的建模思想,建立气固两相流的变尺度格子气模型,用微观层次的气固作用规则描述两相流的宏观行为.二维流场空间被离散成两层不同尺度的正六边形网格,固体颗粒和气体粒子分别在各自的网格上运动;在格子气自动机基本规则基础上设计气固相作用规则和附加演化规则;确定模型宏观物理量的统计计算方法,并根据相似原理建立模型物理量与真实物理量之间的转换关系.用建立的模型对鼓泡床内气固流动行为进行模拟,通过比较发现,变尺度格子气模型的模拟结果与文献中的实验结果和双流体模型的模拟结果吻合较好,且平均相对误差更小,表明建模方法的正确性和模型的有效性.

关键词: 变尺度, 格子气自动机, 气固两相流, 鼓泡床, 模拟

Abstract: A variable-scale lattice gas automata model for gas-solid two-phase flow is established based on lattice gas automata (LGA)in which macroscopic behavior is described with microscopic gas-solid interactions.A two-dimensional flow field is divided into two.deck hexagon laRiees with different scales,where solid particles and gas pseudo-particles are aligned in lattices for solid and gas respectively.In addition to basic LGA rules.collision and propagation rules ale specifically designed for gas-solid systems,as well as additional evolution rules.A statistical method of macroscopic properties and conversion between model parameters and hydrodynamic properties based on similarity principle aIe established. Simulations of dynamic behaviors of gas-solid two-phase flow in a bubbling fluidized bed with this model show good agreement with experiments as well as simulation results with a two-fluid model.It has less average deviation,which validates the proposed model.

Key words: scale, lattice gas automata, gasolid two-phase flow, bubbling fluidized bed, simulation

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