CFD­DEM simulation and Laser CT Measurement of Particle Dispersion Behaviours in an Accelerative Container

Tong ZHAO * Masahiro TAKEI *

*Department of Mechanical Engineering, College of Science and Technology, Nihon University (1­8­14, Kanda Surugadai, Chiyoda­ku, Tokyo 101­8308)

ABSTRACT

This paper presents a study of the particle dispersion behaviours under acceleration conditions in the solid­air two­phase flow by means of a combined three­dimensional model of computational fluid dynamics and discrete element method (CFD­DEM). The simulation model provides the information regarding the particle distribution behaviours within the calculation region and the particle run­out rate from the calculation region under different parameter conditions, such as particle size, initial particle loading and particle acceleration condition. The calculation was made for the same geometric and operating conditions as the experiment which was carried out for comparison with the simulation using laser tomography. The comparison results demonstrate that the acceleration in the horizontal direction adversely affects the particle run­out rate.

Keywords Solid­air two­phase flow, Acceleration, Particle dispersion behaviours