Finite element analysis of laminar mixed convection in the entrance region of horizontal annular ducts

Journal Article · Fri Feb 23 04:00:00 EST 1996 · Numerical Heat Transfer. Part A, Applications

DOI:https://doi.org/10.1080/10407789608913795· OSTI ID:242198

Nonino, C; Giudice, S del ^[1]

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1. Univ. di Udine (Italy). Dipt. di Energetica e Macchine

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.

• Sponsoring Organization: USDOE
• OSTI ID: 242198
• Journal Information: Numerical Heat Transfer. Part A, Applications, Journal Name: Numerical Heat Transfer. Part A, Applications Journal Issue: 3 Vol. 29; ISSN 1040-7782; ISSN NHAAES
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
ANNULAR SPACE
DUCTS
FINITE ELEMENT METHOD
FORCED CONVECTION
LAMINAR FLOW
NATURAL CONVECTION