A New Approach to Fixed Bed Radial Heat Transfer Modeling Using Velocity Fields from Computational Fluid Dynamics Simulations

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• 作者：Mohsen Behnam ; Anthony G. Dixon ; Michiel Nijemeisland ; E. Hugh Stitt
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：November 6, 2013
• 年：2013
• 卷：52
• 期：44
• 页码：15244-15261
• 全文大小：1112K
• 年卷期：v.52,no.44(November 6, 2013)
• ISSN：1520-5045

文摘

A new velocity-based approach to fixed bed radial heat transfer is presented. Axial and radial velocity components were averaged from detailed 3D computational fluid dynamics (CFD) fixed bed simulations of computer-generated beds of spheres and used to model radial thermal convection. The convection terms were coupled with a radially varying stagnant bed thermal conductivity in a 2D pseudocontinuum fixed-bed heat transfer model. The usual effective radial thermal conductivity k_r and apparent wall heat transfer coefficient h_w were not used, and there were no adjustable parameters. The radial and axial temperature variation predicted by the velocity-based model agreed well with the angular-averaged temperatures from the detailed 3D CFD simulations over the range 80 鈮?Re 鈮?1900 and for N = 3.96, 5.96, and 7.99.