Effect of interstitial fluid on a granular flowing layer in the drum

• Main Authors: Hsuan-Yuan Chang, 張軒源
• Other Authors: 周憲德
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/85042067157971584980

碩士 === 國立中央大學 === 土木工程研究所 === 95 === Granular flow which was extensively applied in many field. A dominant aspect of granular flows is flow in thin surface layers while an understanding of the dynamics of dry granular surface flow has begun to emerge, the case of flow when air is replaced by a liquid is largely unexplored. This study discussed the granular flow effect of the interstitial fluid in the drum. Experiments were performed using particle tracking velocimetry(PTV) in a quasi-two-dimensional rotating tumbler to measure the velocity field within the flowing layer of monodisperse spherical particles, for a range of Froude numbers,fluid densities and fluid viscosities. The angle of repose with a liquid interstitial fluid are generally larger than for the dry system under similar conditions. At higher liquid content, lubrication forces play a role to general a new flowing regime in the drum; The dry granular in the drum have six flowing regimes with different Froude number and filling ratio. In this study compared the phase diagram with dry and wet system.