The role of turbulence length scale and turbulence intensity on forced convection from a heated horizontal circular cylinder
Experimental Thermal and Fluid Science
Circular cylinder, Convective heat transfer, Turbulence intensity, Turbulence length scale
The effects of turbulence integral length scale and turbulence intensity on the convective heat transfer rate from a heated circular cylinder in crossflow of air were investigated. An aluminium cylinder of diameter 50.8 cm (2″) and with uniform surface temperature was placed horizontally in a wind tunnel. The cylinder was subjected to a homogeneous, isotropic turbulent flow, which was generated using a perforated plate. The cylinder surface temperature was monitored and measured with five embedded thermocouples. Tests were conducted at a Reynolds number of 27,700, relative turbulence intensity, Tu from 2.9% to 8.3% and turbulence integral length scale to cylinder diameter ratio, L/D from 0.50 to 1.47. For L/D = 0.78, heat transfer increased with increasing turbulence intensity, whereas for Tu = 6.9%, heat transfer decreased with increasing turbulence length scale. © 2006 Elsevier Inc. All rights reserved.
Sak, C.; Liu, R.; Ting, D. S.K.; and Rankin, G. W.. (2007). The role of turbulence length scale and turbulence intensity on forced convection from a heated horizontal circular cylinder. Experimental Thermal and Fluid Science, 31 (4), 279-289.