Investigation of trajectory and rise velocity of loaded and bare single bubbles in flotation process using video processing technique

被引：14

作者：

Eskanlou, Amir ^{[1
]}

Khalesi, Mohammad Reza ^{[1
]}

Mirmogaddam, Morteza ^{[1
]}

Chegeni, Mohsen Hemmati ^{[2
]}

Hassas, Behzad Vaziri ^{[3
]}

机构：

[1] Tarbiat Modares Univ, Dept Min Engn, Tehran, Iran

[2] Arak Univ Technol, Dept Min Engn, Arak, Iran

[3] Penn State Univ, Dept Energy & Mineral Engn, Coll Earth & Mineral Sci, University Pk, PA 16802 USA

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2019年 / 54卷 / 11期

关键词：

Video processing; velocity; bubble; trajectory; flotation; TERMINAL VELOCITY; COLLISION EFFICIENCY; ELLIPSOIDAL BUBBLE; VISCOUS-LIQUIDS; GAS BUBBLE; SHAPE; MOTION; SIZE; WAKE; HYDRODYNAMICS;

D O I：

10.1080/01496395.2018.1539104

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In flotation, among the key parameters that dictate the hydrodynamic characteristics are bubble rising velocity and trajectory. This study aims to investigate the trajectory and rise velocity of loaded and bare bubbles using an experimental setup and video processing technique. After acquiring the videos of rising bubbles, using the background subtraction algorithm, bubbles were detected and their rise velocity and trajectory were determined with regard to the changes in the coordinates of bubbles' centers. It was shown that bare bubbles have a zigzag trajectory, while for loaded bubbles the trajectory was close to the straight vertical path. In addition, with increasing bubble size, the rise velocity and the deviation from the straight path increase.

引用

页码：1795 / 1802

页数：8

共 49 条

[31] A new experimental method to analyze the dynamics and the morphology of bubbles in liquids: Application to single ellipsoidal bubbles [J].