Experimentally validated numerical study of gas-solid vortex unit hydrodynamics

被引：24
作者：
Niyogi, K. [1 ]
Torregrosa, Maria M. [1 ]
Pantzali, Maria N. [1 ]
Heynderickx, Geraldine J. [1 ]
Marin, Guy B. [1 ]
机构：
[1] Univ Ghent, Chem Technol Lab, Technol Pk 914, B-9052 Ghent, Belgium
来源：
POWDER TECHNOLOGY | 2017年 / 305卷
基金：
欧洲研究理事会;
关键词：
Gas-solid vortex unit; Rotating fluidized bed; Computational fluid dynamics; Eulerian multiphase modeling; ROTATING FLUIDIZED-BED; STATIC GEOMETRY; PARTICLE FLOW; REACTOR; CHAMBER; SIZE; SIMULATION; VELOCITY; HEAT;
D O I：
10.1016/j.powtec.2016.10.049
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
A three-dimensional numerical analysis of the flow in a Gas-Solid Vortex Unit (GSVU) is carried out. The numerical model is first validated by comparing the bed pressure drop and solids velocity with experimental data. Next, the influence of gas flow rate, solids density, and particle diameter on the pressure drop, solids velocity, bed void fraction and slip velocity between the two phases is studied. A stable, solids bed is achieved for the entire range of gas flow rates tested (0.1-0.6 Nm(3)/s). No particle entrainment is observed when varying the solid density (180-0450 kg/m(3)) or the particle diameter (2-0.5 mm). A shift to bubbling fluidization regime is observed for small particle diameters (0.5 mm). The observed changes in the GSVU flow patterns are discussed by analyzing the changes in the cumulative centrifugal to drag force ratio over the bed. (C) 2016 The Authors. Published by Elsevier B.V.
引用
收藏
页码：794 / 808
页数：15
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