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
收藏
页码：329 / 342
页数：14
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