Study of bubble induced flow structure using PIV

被引：86

作者：

Liu, ZL

Zheng, Y

Jia, L

Zhang, QK

机构：

[1] Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada

[2] CANMET Energy Technol Ctr, Ottawa, ON K1A 1M1, Canada

来源：

CHEMICAL ENGINEERING SCIENCE | 2005年 / 60卷 / 13期

基金：

加拿大创新基金会; 加拿大自然科学与工程研究理事会;

关键词：

particle image velocimetry (PIV); multiphase flow; turbulence; visualization; hydrodynamics; bubble columns;

D O I：

10.1016/j.ces.2004.03.049

中图分类号：

TQ [化学工业];

学科分类号：

0817 [化学工程与技术];

摘要：

An experimental investigation of the flow structure induced by a chain of gas bubbles was carried out in a rectangular bubble column using particle image velocimetry (PIV). It is observed that the bubble rising trajectory changes from one dimension to three dimension as liquid viscosity reduces. The variation of bubble rising trajectory associates with the alternation of bubble motions-with or without oscillatory and rotational motion depending the bubble rising trajectory is 3-D or 1-D. The different behaviors of gas bubbles introduce various instantaneous and averaged liquid flow structures. In general, complex fluid velocity fields present in liquid system of low viscosity where free vortex, cross flow, and irregular circular flow can be observed. The liquid pseudo-turbulence measured in terms of turbulence intensity and Reynolds stress is more intense in liquid of low viscosity. The turbulence is also enhanced by the frequency of bubble formation. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：3537 / 3552

页数：16

共 13 条

[1]

A numerical investigation of particle deposition on a square cylinder placed in a channel flow [J].