Evaluation of multiphase flotation models in grid turbulence via Particle Image Velocimetry |
| |
| Authors: | Michael R Brady Demetri P Telionis Pavlos P Vlachos Roe-Hoan Yoon |
| |
| Institution: | aVirginia Tech, Engineering Science and Mechanics Department, 219 Norris Hall, Blacksburg, VA 24061, USA;bVirginia Tech, Department of Mechanical Engineering, 100 Randolph Hall, Blacksburg, VA 24061, USA;cVirginia Tech, Department of Mining Engineering, Holden Hall, Blacksburg, VA 24061, USA |
| |
| Abstract: | Industrial processes involving multi-phase flows such as flotation require understanding of the relationships between bubbles, solid particles and the flow. Modern experimental tools are employed in this effort to measure with great accuracy the basic features of the motion of all three phases in turbulent flow. We employed a unique Digital Particle Image Velocimeter (DPIV) that can record with great accuracy and kHz temporal resolution, velocity vectors of all three phases, namely the fluid, the solid particles and the air bubbles. The interaction of these three phases was studied in homogeneous isotropic turbulence generated by cylindrical grids. Particles and bubbles were released into the turbulence and the motions of the three phases were monitored. The experimental results obtained in the present work were compared with the predictions of the models published in the literature. |
| |
| Keywords: | grid turbulence PIV bubble flotation slip velocity |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
