Over a range of 102 < Re* < 5800, 6.5 < Pr* < 79, and 0.6 < n < 1, circumferential wall temperatures for water and aqueous polymer (purely viscous) solution flows over a smooth cylinder were measured experimentally. The cylinder was heated by passing direct electric current through it. Aqueous solutions of Carbopol 934 and EZ1 were used as power-law non-Newtonian fluids. The peripherally averaged heat transfer coefficient for purely viscous non-Newtonian fluids, at any fixed flow rate, decreases with increasing polymer concentration. A new correlation is proposed for predicting the peripherally averaged Nusselt number for power-law fluid hows over a heated cylinder in cross flow. (C) 2000 Elsevier Science Inc. All rights reserved. References: 35
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