Library Subscription: Guest

ISSN Online: 2377-424X

ISBN Print: 0-85295-345-3

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

CONVECTIVE HEAT TRANSFER FROM FINITE CYLINDERS MOUNTED ON A PLANE WALL

Get access (open in a dialog) DOI: 10.1615/IHTC10.1090
pages 71-76

Abstract

Convective heat transfer from wall-mounted cylinders of finite height exposed to an external boundary layer flow is experimentally investigated. Using the naphthalene sublimation technique, surface-averaged heat transfer characteristics are examined for cylinders situated in solitary, two-cylinder and array configurations. For the solitary and two-cylinder arrangements, cylinders of two different height-to-diameter ratios (H/D = 1,3) are studied. The effects of inter-cylinder spacings (S/D = 2,4) on the mass transfer from the two cylinders, mounted in tandem, reveals dominating influence of three-dimensional separation features such as horseshoe vortex systems and associated wake turbulence. Two cylinder arrays, comprising of wall-mounted elements (H/D = 1) in both in-line and staggered arrangements, display strong variations in convective characteristics along the stream wise direction. The overall mass transport from an in-line array is slightly higher than it's staggered counterpart, possibly due to severe flow depletion away from the array. Power-law correlations of the element Sherwood(Nusselt) number are presented for a range of Reynolds number between 4.8 × 103 ≤ Re ≤ 1.9 × 104