THREE-DIMENSIONAL NATURAL CONVECTION HEAT TRANSFER INSIDE A VERTICAL CYLINDER CONTAINING ECCENTRICALLY DISTRIBUTED INTERNAL HEAT SOURCE

1994 ◽  
Author(s):  
Saburo Toda ◽  
Kenji Takeuchi ◽  
N. Naitoh ◽  
Hidetoshi Hashizume
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Heat Source ◽  
Three Dimensional ◽  
Convection Heat Transfer ◽  
Internal Heat ◽  
Vertical Cylinder ◽  
Internal Heat Source ◽  
Natural Convection Heat Transfer ◽  
Convection Heat

On Natural Convection Heat Transfer From Three-Dimensional Bodies of Arbitrary Shape

1989 ◽  
Vol 111 (2) ◽  
pp. 363-371 ◽  
Author(s):  
A. V. Hassani ◽  
K. G. T. Hollands
Keyword(s):  
Heat Transfer ◽  
Natural Convection ◽  
Arbitrary Shape ◽  
Three Dimensional ◽  
Convection Heat Transfer ◽  
Simple Expression ◽  
Natural Convection Heat Transfer ◽  
Convection Heat ◽  
Oblate Spheroids ◽  
Body Shapes

A simple expression is developed for the natural convection heat transfer from three-dimensional bodies of arbitrary shape immersed in an extensive fluid. The expression applies to both laminar and turbulent regimes and requires the calculation of purely geometric properties of the bodies. Experiments were performed with air, covering a Rayleigh number (Ra) range of from 10 to 108, on different body shapes oriented in various directions: for example, circular or square disks, a short circular cylinder of height equal to diameter and a similar cylinder but with hemispherical ends, prolate and oblate spheroids of various aspect ratio, and an “apple core” shape. Comparison between the predictions of the expression and the experimental results of this work and those gathered from several other sources ranging up to Ra = 1014 showed very good agreement, with an average rms difference of 3.5 percent for Ra < 108 and 22 percent for 108 < Ra < 1014.

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