Mathematical simulation of radial heat transfer in packed beds by pseudohomogeneous modeling

查看全文 作　　者：Rodrigo [1]Béttega;Marcos Flávio Pinto [2]Moreira;Ronaldo Guimaraes [3]Corrêa;José Teixeira [3]Freire

机构地区：[1]Federal University of Uberlandia/School of Chemical Engineering-Av.Jo o Naves ávila 2121,Uberlandia-MG,CEP 38400-902,Brazil;[2]Western Paraná State University-Rua da Faculdade 645,Jardim La Salle,Toledo-PR,CEP 85903-000,Brazil;[3]Federal University of S o Carlos/Department of Chemical Engineering-Rod.Washington Luiz km 235,S o Carlos-SP,CEP 13565-905,P.O.Box 676,Brazil

出　　处：《Particuology》索引2011年第9卷第2期,共7页

基　　金：the financial support from CNPq/Brazil 摘　　要：Uniform flow regime and constant effective thermal conductivity inside packed beds are commonly accepted in the evaluation of the fluid dynamics and heat transfer in such systems.However,several authors have confirmed the presence of an oscillatory velocity profile caused by the effective contribution of porosity profile in the fluid dynamic behavior of packed beds,which directly influences the heat transfer inside the beds.This paper describes the application of a pseudo-homogeneous mathematical model for describing heat transfer in packed beds with oscillatory profiles of velocity and porosity,using a radius-dependent model for effective thermal conductivity k r.Several temperature profiles were obtained in a packed bed system with thermal source located on the wall.The simulated temperature and effective thermal conductivity obtained from simulations were compared with experimental data and calculation from a model based on uniform k r fitting.The results indicate that the proposed mathematical modeling was capable of better representing the heat transfer in the packed bed. 关键词：数学模拟填充床热转移有效导热系数数学模型建模径向振动速度

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Mathematical simulation of radial heat transfer in packed beds by pseudohomogeneous modeling

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