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Improved Hybrid Solution of Conjugate Heat Transfer of Laminar Convection in Ducts With Axial Wall Conduction

[+] Author Affiliations
Jian Su, Ana C. R. de Castro

Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil

Paper No. HT2003-47019, pp. 179-186; 8 pages
doi:10.1115/HT2003-47019
From:
  • ASME 2003 Heat Transfer Summer Conference
  • Heat Transfer: Volume 1
  • Las Vegas, Nevada, USA, July 21–23, 2003
  • Conference Sponsors: Heat Transfer Division
  • ISBN: 0-7918-3693-2 | eISBN: 0-7918-3679-7
  • Copyright © 2003 by ASME

abstract

This paper describes a hybrid analytical-numerical solution of conjugate heat transfer of laminar flow in a circular duct with axial wall conduction. An improved lumped-differential formulation is used to treat heat conduction in the wall; the Generalised Integral Transform Technique (GITT) is used to solve the energy equation in laminar flow. The coupled partial differential equations in the solid and fluid regions are reduced to a set of coupled ordinary differential equations. Analytical solution is obtained for a truncated set of ordinary differential equations. Improvement is expected over classical lumped models which are only applicable to problems with Biot numbers less than 0.1.

Copyright © 2003 by ASME

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