Interstitial Liquid effects on the dynamic of granular mixture of Steel spheres and improvement of the relevant image processing techniques
Date Issued
2012
Date
2012
Author(s)
Tsai, Ching-Yu
Abstract
This thesis investigates how the interstitial viscous liquid may modify the steady solid-liquid granular flow behavior in a rotating drum via systematic experiments. The particle motions were monitored via a high-speed digital camera. The acquired images are processed by the circular Hough transformation to locate individual spheres in each image. The same particle is paired in two consecutive images by the method of the nearest neighbor to acchive particle tracking velocimetry (PTV) for the the instantaneous velocity of each particle. By threading the center of all the surface spheres, we could fit a line through the straight free surface and the line slope could be employed to estimate the dynamic repose angle
Subjects
granular flow
solid-liquid two-phase mixtures
steel spheres
rotating drum
Circular Hough Transformation
PTV
dynamic repose angle
flow regime
flowing layer thickness
strain rate
granular temperature
Type
thesis
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