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Numerical Heat Transfer, Part A: Applications
An International Journal of Computation and Methodology
Volume 29, 1996 - Issue 3
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Original Articles

FINITE ELEMENT ANALYSIS OF LAMINAR MIXED CONVECTION IN THE ENTRANCE REGION OF HORIZONTAL ANNULAR DUCTS

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Pages 313-330 | Received 19 Dec 1994, Accepted 04 Oct 1995, Published online: 03 Apr 2007
 

Abstract

The laminar mixed convection in the entrance region of horizontal straight ducts of an annular cross section is studied by means of a generally applicable finite element procedure based on the parabolized simplification of the Navier-Stokes and energy equations and on the Boussinesq approximation of the buoyancy term. The procedure is validated through comparisons of computed results with available data from the literature. New results concern annuli with radius ratios equal to 0.25, 0.5, and 0.75 subjected to the fundamental boundary condition of the second and the third kinds, for Prandtl numbers equal to 0.7 and 7, and different values of Grashof number.

Notes

Address correspondence to Dr. Carlo Nonino, Dipartimento di Energetica e Macchine, Universita degli Studi di Udine, Via delle Scienze 208, 33100 Udine, Italy.

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