ISSN Online: 2377-424X
ISBN Print: 0-85295-345-3
International Heat Transfer Conference 10
CONVECTIVE HEAT TRANSFER FROM FINITE CYLINDERS MOUNTED ON A PLANE WALL
Аннотация
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