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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2446
Title: Forced convection in cross flow of power law fluids over a tube bank
Authors: Mangadoddy N.
Bharti, Ram Prakash
Chhabra R.P.
Eswaran V.
Published in: Chemical Engineering Science
Abstract: The forced convective heat transfer characteristics for incompressible power-law fluids past a bundle of circular cylinders have been investigated numerically. The cylinder-to-cylinder hydrodynamic interactions have been approximated via a simple cell model. The momentum and energy equations have been solved using a finite difference based numerical method for a range of physical and kinematic conditions. The role of the two commonly used thermal boundary conditions, namely, constant temperature or constant heat flux, on heat transfer characteristics has also been studied. Extensive numerical results elucidating the effect of shear-thinning viscosity on the values of Nusselt number have been obtained for Peclet numbers ranging from 1 to 5000, Reynolds number in the range 1-500, flow behaviour index 1 ? n ? 0.5 and three values of voidages, namely, 0.4, 0.5 and 0.6, typical of tubular heat exchangers and tube banks. Under all conditions, varying levels of enhancement in Nusselt number are observed due to shear-thinning behaviour. The surface averaged Nusselt number shows strong dependence on the values of voidage, power-law index, Reynolds and Peclet numbers. The paper is concluded by presenting comparisons with the scant experimental results available in the literature. © 2004 Elsevier Ltd. All rights reserved.
Citation: Chemical Engineering Science (2004), 59(11): 2213-2222
URI: https://doi.org/10.1016/j.ces.2004.01.054
http://repository.iitr.ac.in/handle/123456789/2446
Issue Date: 2004
Keywords: Nusselt number
Power law fluids
Shear-thinning liquids
Tube bundle
ISSN: 92509
Author Scopus IDs: 7003589143
14521775900
56657757000
7003783046
Author Affiliations: Mangadoddy, N., Department of Chemical Engineering, Indian Institute of Technology, Kanpur 208016, India
Prakash, R., Department of Chemical Engineering, Indian Institute of Technology, Kanpur 208016, India
Chhabra, R.P., Department of Chemical Engineering, Indian Institute of Technology, Kanpur 208016, India
Eswaran, V., Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016, India
Corresponding Author: Chhabra, R.P.; Department of Chemical Engineering, Indian Institute of Technology, Kanpur 208016, India; email: chhabra@iitk.ac.in
Appears in Collections:Journal Publications [CH]

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