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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

NUMERICAL MODELING STUDY ON HEAT TRANSFER IN A CONICAL FLUIDIZED BED REACTOR WITH IMMERESED HEATER

Hamada M. Abdelmotalib
Dept. of Mechanical Design Eng., Chonbuk National University, Jeonju, Republic of Korea; Dept. of Mechanical Power and Energy, Minia University, Elminia, Egypt

Min Soo Kim
Department of Mechanical Design Eng., College of Eng., Chonbuk National Univ. Jeonju 54896, Rep. of Korea

Chan Woo Park
Department of Mechanical Design Eng., College of Eng., Chonbuk National Univ. Jeonju 54896, Rep. of Korea

Ik-Tae Im
Department of Mechanical Design Eng., College of Eng., Chonbuk National Univ. Jeonju 54896, Rep. of Korea

Abstract

In this paper, numerical and experimental analysis of the heat transfer between an immersed heater and a cone bed of sand particles were carried out. A 3-dimensional model using the Eulerian-Eulerian model coupling with kinetic theory for granular flow was used to simulate heat transfer and related bed flow characteristics. The investigation was carried out at different inlet gas velocity represented by the fluidizing number, (the ratio between inlet gas velocity to minimum fluidizing velocity) and different particle-wall boundary conditions. Both the experiments and numerical simulation results showed that the heat transfer coefficient and bed expansion ratio increased with increasing inlet gas velocity. For particle-wall boundary condition, applying no slip condition resulted in best heat transfer coefficient and bed expansion ratio compared to experimental results.

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