Forced convection heat transfer from a circular cylinder in crossflow to air and liquids |
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| Authors: | S. Sanitjai |
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| Affiliation: | Department of Mechanical Engineering, University of Minnesota, Heat Transfer Laboratory, 125, Mechanical Eng. Building, 111 Church Street SE, Minneapolis, MN 55455, USA |
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| Abstract: | Local and average heat transfer by forced convection from a circular cylinder is studied for Reynolds number from 2 × 103 to 9 × 104 and Prandtl number from 0.7 to 176. For subcritical flow, the local heat transfer measurement indicates three regions of flow around the cylinder: laminar boundary layer region, reattachment of shear layer region and periodic vortex flow region. The average heat transfer in each region is calculated and correlated with the Reynolds number and the Prandtl number. The Nusselt number in each region strongly depends on the Reynolds number and the Prandtl number with different power indices. An empirical correlation for predicting the overall heat transfer from the cylinder is developed from the contributions of heat transfer in these three regions. |
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| Keywords: | Heat transfer Circular cylinder Reynolds number Prandtl number |
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