Fluid dynamics of a pressurized fluidized bed: comparison between numerical solutions from two-fluid models and experimental results

被引：49

作者：

Enwald, H ^{[1
]}

Almstedt, AE ^{[1
]}

机构：

[1] Chalmers Univ Technol, Dept Thermo & Fluid Dynam, S-41296 Gothenburg, Sweden

来源：

CHEMICAL ENGINEERING SCIENCE | 1999年 / 54卷 / 03期

关键词：

fluidized bed; two-fluid model; granular flow theory; turbulence; validation;

D O I：

10.1016/S0009-2509(98)00187-0

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A validation of four different two-fluid model closures was carried out to investigate the effect of gas-phase turbulence, drift velocity and three dimensionality on the fluid dynamics of a bubbling fluidized bed. At atmospheric conditions, it is verified that gas-phase turbulence has a negligible effect for the bed material and operating conditions used in the investigation, whereas the validation shows some evidence that the gas-phase turbulence has a significant contribution for higher pressures. The drift velocity shows no noticeable effect on the results at any pressure. A comparison between two- and three-dimensional calculations at atmospheric pressure shows that the three-dimensional effects appear to be considerable. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：329 / 342

页数：14