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A comparison of pendulum experiments and discrete-element simulations of oblique collisions of wet spheres
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  • Oscar Punch,
  • Megan Danczyk,
  • Mathew Hawken,
  • Daniel Holland
Oscar Punch
University of Canterbury
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Megan Danczyk
University of Canterbury
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Mathew Hawken
University of Canterbury
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Daniel Holland
University of Canterbury
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Abstract

Oblique collisions of two spherical particles coated with a thin layer of viscous liquid are considered. Experimental measurements are performed using particle tracking velocimetry. Comprehensive experimental data for collisions with an impact angle between 0° - 60° are presented. Collisions are characterised by the Stokes’ number, the coefficient of restitution, and the rotational velocity. The experiments are compared to numerical simulations using the discrete element method (DEM). The translational velocities predicted by the simulations were in good agreement with the experiments at high Stokes’ number, where the models are dominated by the normal components. As the tangential forces become more significant (i.e. at low to medium Stokes’ number, and high collision angle), agreement between the simulations and experiments is poorer. At low Stokes’ number the translational velocities were in good agreement with the experiments, but was poorer at high Stokes’ number.
06 Aug 2022Submitted to AIChE Journal
07 Aug 2022Assigned to Editor
07 Aug 2022Submission Checks Completed
13 Aug 2022Reviewer(s) Assigned
14 Sep 2022Editorial Decision: Revise Major