The effect of interstitial fluid viscosity on particle segregation in a slurry rotating drum

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题名:	The effect of interstitial fluid viscosity on particle segregation in a slurry rotating drum
作者:	Chou,SH;Liao,CC;Hsiau,SS
贡献者:	機械工程學系
关键词:	SHEARED GRANULAR FLOWS;TRANSVERSE MOTION;ROTARY KILNS;CYLINDERS;TRANSITION;MIXTURES;FRICTION;REGIME;SOLIDS;POWDER
日期:	2011
上传时间:	2012-03-27 17:08:05 (UTC+8)
出版者:	國立中央大學
摘要:	Although the segregation of dry granular surface flow has been widely studied, cases where the air is completely replaced by a liquid still remain unexplored. In this study, we report on experiments performed to investigate the phenomena of particle segregation and flowing behavior in a rotating drum with liquids of different viscosities and different filling degrees. The experimental results indicate that the viscosity of the interstitial fluid has a significant effect on the granular flow in the slurry granular flow. The segregation index and angle of repose are shown to decrease with increased liquid viscosity. When the liquid viscosity is the same, the increase in filling degree causes the segregation index to increase, while the net rate of mixing seems to decrease. A new dimensionless flow variable is used to distinguish the flow regimes. We find that the flow regime changes from rolling regime to cascading regime when the dimensionless flow variable is below a critical value. Furthermore, the change of segregation index occurs during the transition of the granular flow regime. (C) 2011 American Institute of Physics. [doi:10.1063/1.3623275]
關聯:	PHYSICS OF FLUIDS
显示于类别:	[機械工程學系] 期刊論文

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