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A Numerical Study on the Effect of Coefficient of Restitution to Heat Transfer in a Conical Fluidized Bed Combustor  

Kang, Seung Mo (Department of Fire-fighting Engineering, Pukyong Univ.)
Park, Woe-Chul (Department of Fire-fighting Engineering, Pukyong Univ.)
Abdelmotalib, Hamada (Department of Mechanical Design Eng., Chonbuk National University)
Ko, Dong Kuk (Department of Mechanical Engineering, Chonbuk National University)
Im, Ik-Tae (Department of Mechanical Design Eng., Chonbuk National University)
Publication Information
Journal of the Semiconductor & Display Technology / v.14, no.4, 2015 , pp. 38-44 More about this Journal
Abstract
In this paper, numerical simulations on conical fluidized bed combustors were carried out to estimate the effect of coefficients of restitution between particle and particle and particle to wall on hydrodynamics and heat transfer. The Eulerian-Eulerian two-fluid model was used to simulate the hydrodynamics and heat transfer in a conical fluidized bed combustor. The solid phase properties were calculated by applying the kinetic theory of granular flow. Simulations results show that increasing the restitution coefficient between the particle and particle results in increasing the bed pressure drop. On other hand, the increasing of particle to wall coefficient of restitution results in decreasing the bed pressure drop. It is found that the coefficient of restitution has little effect on heat transfer.
Keywords
Fluidized bed combustor; Coefficient of restitution; Computational fluid dynamics; Heat transfer coefficient;
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