| Title |
A Study on the Interaction between Particles and Surrounding Fluid |
| Keywords |
Dispersed two-phase flow ; 분산 이상류 ; Particle ; 입자 ; PIV ; 입자영상 유속계 ; PTV ; 입자추적 유속계 ; Image processing ; 화상처리 |
| Abstract |
The fundamental mechanism of a dispersed two-phase flow was investigated. Experiments were carried out to understand how the particles behaves under the influence of the particle size, shape, metamorphoses (bubble) and buoyancy of a single particle which is ascending from the standstill water. Two CCD cameras were employed for image processing of the behavior of the particles and the surrounding flow, which was interpreted with the technique of correlation PIV (Particle Image Velocimetry) and PTV (Particle Tracking Velocimetry), respectively. The experimental results showed that the large density difference between a particle and water caused high relative velocity and induced zigzag motion of the particle. Furthermore, the turbulence intensity of a bubble was about twice the case of the spherical solid particle of similar diameter. |