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Maximum ceasing angle of inclination and flux formula for granular orifice flow

Peng Zheng Jiang Yi-Min

Maximum ceasing angle of inclination and flux formula for granular orifice flow

Peng Zheng, Jiang Yi-Min
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  • Abstract views:  3834
  • PDF Downloads:  945
  • Cited By: 0
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  • Received Date:  08 November 2010
  • Accepted Date:  23 November 2010
  • Published Online:  15 May 2011

Maximum ceasing angle of inclination and flux formula for granular orifice flow

  • 1. School of Physical Science and Technology,Central South University, Changsha 410083,China

Abstract: This work measured mass flux of a granular sample (glass beads) discharged from an inclined orifice for various inclination angles and orifice diameters. It is found that irrespective the orifice sizes, the fluxes all vary linearly with cosine of the inclination angle,and the linearly extrapolated angle of zero-flux,namely the critical angle of flow ceasing, increases linearly with ratio between grain and orifice diameter, tends to the angle of repose in the limit of infinite orifice diameter within an approximation of the Bagnold angle. The results show that the flux formula varying linearly with cosine of inclination angle is capable to reveal behaviors of the critical ceasing angle, a property that the Beverloo formula of which parameters vary with cosine of inclination angle can not describe.

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