Multi-scale analysis on particle-phase stresses of coarse particles in bubbling fluidized beds

被引：20
作者：
Wang, JW
Ge, W
机构：
[1] Chinese Acad Sci, Inst Proc Engn, Multiphase React Lab, Beijing 100080, Peoples R China
[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
来源：
CHEMICAL ENGINEERING SCIENCE | 2006年 / 61卷 / 08期
基金：
中国国家自然科学基金;
关键词：
multi-scale analysis; granular temperature; granular pressure; bubbling fluidized beds; particle-phase stresses;
D O I：
10.1016/j.ces.2005.11.050
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Despite the restless efforts devoted to the hydrodynamics of bubbling fluidized beds, the particle-phase stress, which is one of the critical issues in modeling bubbling fluidized beds by the Eulerian approach, is not well understood. To address this problem, a mathematical model is developed to describe the kinetic properties of coarse particles, such as granular temperature and granular pressure, based on a multi-scale analysis of particle velocity fluctuation. Contributions from both high-frequency particle-scale fluctuations and low-frequency bubble-induced fluctuations are considered. It is proven to agree well with experimental data available up to date from bubbling fluidized beds for Geldart B and D particles. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码：2736 / 2741
页数：6
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