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ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

International Heat Transfer Conference 10
August, 14-18, 1994, Brighton, UK

STEADY MIXED CONVECTION IN AN ECCENTRIC ANNULUS

Get access (open in a dialog) DOI: 10.1615/IHTC10.3380
pages 543-548

要約

This paper describes a numerical method which has been used to predict the combined convection flow of Newtonian fluids in vertical eccentric annuli, in which the inner and outer walls are held at different temperatures. Assuming that the ratio of the radial to the ajrial length scale, ε, is small, as found in many industrial applications, then the full steady, momentum, energy and continuity equations are simplified by expanding the variables in the governing equations in terms off. The numerical procedure consists of marching streamwise in the vertical direction using a finite-difference scheme and solving the resulting equations at each streamwise step by the Finite Element Method. The process is continued until either the velocity, pressure and temperature fields are fully developed, or on reaching the onset of flow reversal. Results which are independent of the mesh in the cross-stream planes and the step-length in the axial direction have been found for a range of the governing parameters - namely the Grashof, Prandtl and Reynolds numbers, the eccentricity and the ratio of the inner to outer radius of the cylinders of the annular gap.