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CFD-DEM Simulation of Particle Behaviors under Acceleration
in a Solid-Air Two Phase Flow
Tong ZHAOEMasahiro TAKEI
@@@The present paper introduces a numerical study of the particle behaviors under acceleration conditions in the solid-air two-phase flow by means of a combined two-dimensional model of computational fluid dynamics and the discrete element method (CFD-DEM). The simulation model provides information regarding the particle distribution behaviors within the calculation region and the particle run-out rate from the calculation region under different parameter conditions, such as particle size, initial particle loading and particle acceleration condition. The results demonstrate that the particle run-out rate is directly affected by the particle size and the initial loading condition. The particle acceleration in the horizontal direction adversely affects the particle run-out rate when the initial particle loading condition is dispersed and uniform. However, this adverse effect disappears when the initial particle loading condition becomes concentrated and partial.
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Keywords: Multi-phase flow, Air cleaning, Computational fluid dynamics, Discrete element method,
Acceleration, Particle behaviors
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