Particle Image Velocimetry Study of the Turbulence Characteristics in an Aerated Flotation Cell

被引：30

作者：

Darabi, Hossna ^{[1
]}

Koleini, S. M. Javad ^{[1
]}

Deglon, David ^{[2
]}

Rezai, Bahram ^{[3
]}

Abdollahy, Mahmoud ^{[1
]}

机构：

[1] Tarbiat Modares Univ, Dept Mineral Proc, Tehran 1411511, Iran

[2] Univ Cape Town, Dept Chem Engn, Mineral Proc Res Unit, ZA-7700 Cape Town, South Africa

[3] Amirkabir Univ Technol, Dept Min & Met Engn, Tehran 1591634311, Iran

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2017年 / 56卷 / 46期

关键词：

LARGE-EDDY SIMULATIONS; GAS-LIQUID FLOW; RUSHTON-TURBINE; TRAILING VORTICES; PIV MEASUREMENTS; DISSIPATION RATE; SCALE MODELS; BUBBLE-SIZE; ENERGY; FIELD;

D O I：

10.1021/acs.iecr.7b03648

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The turbulence characteristics in the presence of bubbles is very important for multiphase processes such as froth flotation. The turbulence characteristics in an aerated Denver flotation cell were investigated using a high speed stereoscopic particle image velocimetry technique at single-phase (water) and two-phase (water and air) systems to provide insight into the change in liquid phase hydrodynamics. The effect of the gas flow rate (0.043-0.125 cms(-1)) and Reynolds number (107 000-154 000) on the fluid flow properties were investigated. The results showed that the flow pattern at the both systems was the radial-type flow. The presence of air bubbles changed the local turbulence characteristics (mean velocity, the root-mean-square velocity, turbulence kinetic energy dissipation, and turbulence kinetic energy). The results obtained may be useful for deeper investigation about the effect of the turbulence properties on the hydrodynamic characteristics and subprocesses in the mechanical flotation cells.

引用

页码：13919 / 13928

页数：10

共 54 条

[1] THE EFFECT OF BUBBLE-SIZE ON THE RATE OF FLOTATION OF FINE PARTICLES [J].