Simulation of Spherocylinder Particle Transport Phenomena using Discrete Element Method
Keywords:Computational Fluid Dynamic (CFD)/ Distinct Element Method (DEM)/ Particle Motion / Spherocylinder Particle.
AbstractSpherocylinder particle motion is simulated in three dimensions using a combined approach of discrete element method and computational fluid dynamics (DEM-CFD). This work is carried out since there are several limitations to use the spherical model for representing the transport phenomena of other particle geometries. Two thousands of particles in a 150Ã—150Ã—400 mm bed are studied for the particle motion, the effect of superficial gas velocity and the bed configuration on the particle temperature distribution and drying rate. The initial temperature and moisture content of particles is 298 K and 0.35, the temperature of the gas is 331.5 K. Heat transfer from gas to a particle is estimated using the modified Ranz-Marshall equation where the influence of surrounded particle on the heat transfer is considered. The results from random particle packing under the gravity are used as the initialize step of the simulations. From the simulation, the results are fairly realistic in particle motion, particle temperature distribution and the drying rate. The results demonstrate that the particle temperature distribution and the drying rate increase with the inlet gas velocity. For the number of feed inlets, the increasing number of feed inlet improves particle movement and particle temperature distribution. However, the drying rate of particles in 4 gas inlets bed decreases from the drying rate of particles in 2 feed inlets bed. This phenomenon comes from the air fed through each nozzle has a shorter period.
Mathur, K.B. and Epstein, N., Spouted Beds, Academic Press (1974), New York.
Cundall, P.A. and Strack, O.D.L., A Discrete Numerical Model for Grannular Assemblies, Geotechnique, Vol. 29 (1979), No. 1, 47-65.
Abreu, C.R.A., Tavares, F.W., Cartier, M., Influence of particle shape on the packing and the segregation of spherocylinders via Monte Carlo simulations, Powder Technology, Vol. 134 (2003), 167-180.
K.B. Mathur and P.E. Gishler, A technique for contacting gases with coarse solid particles, AIChE. Journal 1 (1955), 157-164.
Pournin, L., Webber, M., Tsukahara, M. and Ferrez, J.A., Three-dimensional distinct element simulation of spherocylinder crystallization, Granular Matter, Vol 7 (2005), 119-126.
Ergun, S., Chemical Engineering Progress, Vol. 48 (1952), No. 2, 123-232.
Wen, C.Y. and Yu, Y.H., Chemical Engineering Progress, Series 62, Vol. 62 (1996), 143-156.
Fan. L., Mao, Z. and Yang, C., Experiment on Settling of Slender Particles with Large Aspect Ratio and Correlation of the Drag Coefficient, Industrial & Engineering Chemistry Research, Vol. 43 (2004), 7664-7679.
Li J. and Mason D.J., A Computational Investigation of Transient Heat Transfer in Pneumatic Transport of Granular Particles, Powder Technology, Vol. 112 (2000), 273-282.
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