MODELING AND SIMULATION OF AIRFLOW IN SPOUTED BED DRYERS |
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| Authors: | A S Franca ML Passos A LT Chattel G Massarani |
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| Affiliation: | 1. Chemical Engineering Department , Universidade Federal de Minas Gerais , C.P. 1294, Belo Horizonte, MG, 30130-060, BRAZIL;2. PEQ/COPPE, Universidade Federal do Rio de Janeiro , Rio de Janeiro, RJ, BRAZIL |
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| Abstract: | ABSTRACT This paper presents an axisymmetric three-dimensional semi-empirical model that describes the airflow in both the spout and annular regions. Both the pressure and air velocity distributions can be calculated at any point inside the dryer. Thus, the effect of the fluid dynamics on the heat and mass transfer coefficients and, consequently, on the drying process, can be evaluated. The finite element method was used to solve the model. Pressure distributions were measured for several conditions in which stable spouted bed flow regime was attained. Simulated pressure distributions agreed well with experimental data. |
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| Keywords: | Airflow spouted bed finite element |
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