Abstract
An experimental study was performed to investigate the heat transfer in separated flow behind a circular cylinder. The Reynolds number ranged from 120 to 30000. The temperature distribution around the cylinder was measured by an infrared camera under the condition of constant heat flux. From the results of the present study, it was found that the heat transfer in the separated flow region is strongly affected by the vortex formation length behind the cylinder. The value of heat transfer coefficient at the rear stagnation, Nur/Re0.5, has a maximum at Re≈200, and has a minimum at Re=1500-3000, corresponding to the change of the vortex formation length.
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