Heat transfer to non-Newtonian flows over a cylinder in cross flow

✍ Scribed by B.K. Rao

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 317 KB
• Volume: 21
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00063-1

✦ Synopsis

Over a range of 102 Re à 5800Y 6X5 Pr à 79, and 0X6 n 1, circumferential wall temperatures for water and aqueous polymer (purely viscous) solution ¯ows 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 ¯uids. The peripherally averaged heat transfer coecient for purely viscous non-Newtonian ¯uids, at any ®xed ¯ow rate, decreases with increasing polymer concentration. A new correlation is proposed for predicting the peripherally averaged Nusselt number for powerlaw ¯uid ¯ows over a heated cylinder in cross ¯ow.