Hydrodynamics of gas-solid flow around immersed tubes in bubbling fluidized beds

被引：60

作者：

He, YR

Lu, HL ^{[1
]}

Sun, QQ

Yang, LD

Zhao, YH

Gidaspow, D

Bouillard, J

机构：

[1] Harbin Inst Technol, Dept Power Engn, Harbin 150001, Peoples R China

[2] IIT, Dept Chem & Environm Engn, Chicago, IL 60613 USA

[3] INERIS, F-60550 Verneuil En Halatte, France

来源：

POWDER TECHNOLOGY | 2004年 / 145卷 / 02期

基金：

美国国家科学基金会;

关键词：

fluidized beds; body-fitted coordinate; immersed tubes; wavelet multi-resolution analysis;

D O I：

10.1016/j.powtec.2004.04.047

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A numerical study was conducted based on the gas-solid two-fluid model using the body-fitted coordinate system to analyze the behavior of particles and bubbles flow in bubbling fluidized beds without and with immersed tubes. The kinetic theory of granular flow was implemented in the model. The images of simulated instantaneous particle concentration and velocity gave the process of the formation, coalescence and eruption of bubbles. The effects of the tube pitch and superficial gas velocity on the fluidization in a bubbling fluidized bed were investigated. Calculated bubble frequencies without and with immersed tubes were in agreement with previous experimental and simulation findings. The wavelet multi-resolution analysis was used to analyze the simulated data of instantaneous particle concentration. From the random-like particle concentration fluctuations, the fluctuating components due to particle flow and bubble motion can be extracted based on the wavelet multi-resolution analysis over a time-frequency plane. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：88 / 105

页数：18

共 40 条

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