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Normal Reynolds Stress and Solid Diffusivity of Solid Particles in Circulating–turbulent Fluidized Bed System Using CFD Simulation

Chattan Sakaunnapaporn, Pornpote Piumsomboon, and Benjapon Chalermsinsuwan
Fuels Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand
Abstract—The solid particle flow pattern is one of the important quantitatively system mixing parameters for designing and operating of fluidized bed system. In this study, the solid dispersion pattern in novel circulating–turbulent fluidized bed flow pattern is explored using computational fluid dynamics simulation, comparing to the neighbor conventional flow patterns. The objective is to investigate the effect of fluidization velocity on the normal Reynolds stress and solid diffusivity of solid particles. From the results, the solid particle flow patterns depended on fluidization velocities. Regarding the contour of solid volume fraction, it found that the solid particle behavior in novel circulating–turbulent fluidized bed flow regime had high solid particle uniformly distributed in the system both in the axial and radial system directions. In addition, the circulating–turbulent fluidization regime showed the constant normal Reynolds stress and solid diffusivity coefficient. 
 
Index Terms—CFD, fluidization, hydrodynamics, normal Reynolds stress, solid diffusivity

Cite: Chattan Sakaunnapaporn, Pornpote Piumsomboon, and Benjapon Chalermsinsuwan, "Normal Reynolds Stress and Solid Diffusivity of Solid Particles in Circulating–turbulent Fluidized Bed System Using CFD Simulation," International Journal of Mechanical Engineering and Robotics Research, Vol. 5, No. 4, pp. 260-263, October 2016. DOI: 10.18178/ijmerr.5.4.260-263
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