Mixture of Particles' Influence in Computer Simulations of a Spouted Bed

Abstract:

This article aims to assess the influence of the way of simulating monoparticles as just monoparticles or as a mixture of particles, the latter, unlike the first, considering the effect of particle-particle interaction. The Eulerian–Eulerian multiphase model is used in the computational simulation of fluid dynamics of spouted beds and compared with experimental data. A half column of cylindrical spouted bed with a full plane glass attached to the front open surface of the bed as the transparent window was used for observation and photographing. Images of solid flows were recorded using a high speed camera (2000 frames per second). Glass beads with a diameter of 0.00368, 0.005 and 0.00252 mm are used as bed material. The simulated characteristic fluid dynamic curves of spouted bed for 0.15 m static bed heights (Ho) were obtained with good agreement with experimental data when the monoparticles was simulated as a mixture of particles with mixture’s percentage of 50%. The same occurred for the simulation of vertical velocities of particles profile, that is, when the monoparticles was simulated as a mixture of particles with mixture’s percentage of 50% we observed a more approach to the experimental data. It was also observed that the air concentration distribution seem to be independent of the changing of the composition.

• Periodical: Materials Science Forum (Volumes 660-661)
• Pages: 448-453
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.660-661.448
• Online since: October 2010
• Authors: D.A. Santos, I. Petri Junior, Marcos A.S. Barrozo, Claudio Roberto Duarte
• Keywords: Computational Fluid Dynamics (CFD), Particle Mixture, Spouted Bed

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