Interstitial Liquid Effects on the Dynamics of Granular Matter in a Rotating Drum
Date Issued
2009
Date
2009
Author(s)
Tsao, Yi-Luen
Abstract
This article focuses on the motion of granular flow in the rotating drum with respect to various interstitial liquids. The average behavior of the mixtures is obtained by employing the high-speed camera with particle tracking velocimetry (PTV). We discovered that the velocity, flowing layer thickness and the granular temperature of the mixtures are different under immersed and non-immersed situations. The momentum equation is simplified by the control volume analysis according to the characteristics of the flow field, and the shear stresses at the bottom flowing layer in the middle of the drum are hence estimated. The effective viscosity of the mixture is obtained from the linear relationship between the shear stress and the shear strain. The viscosity of the mixture is always larger than that of the interstitial fluid. Thus, the interaction among those granulates is the major mechanism of energy dissipation.
Subjects
granular flow
PTV
interstitial liquid
rotating drum
Type
thesis
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