An experimental study is reported of heat transfer to laminar flow of two water-methocel pseudoplastic (power law) solutions in a circular tube subjected to a uniform wall heat flux. The object of this study was to evaluate the effects of non-Newtonian behavior and temperature-dependent consistency on heat transfer. The experimental Nusselt numbers are compared with numerical predictions and experimental data. Two correlations are recommended according to the temperature-dependence of the rheological characteristics.

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Gravitational capillary viscometer for low-temperature liquids Rev. Sci. Instrum. 78, 033906 (2007); 10.1063/1.2716823 Low-shear-rate capillary viscometer for polymer solution intrinsic viscosity determination at varying temperatures Rev. Sci. Instrum. 74, 176 (2003); Dual chamber capillary viscometer for viscosity measurements of concentrated polymer solutions at elevated temperatures Rev.

= t enipcwt urc d q w n d e t i t slag the rmal conductivity = nuniher of physical cells in x ' = numlwr of physical cells in y ' = slag pressure September, 1981 AlChE Journal (Vd. 27, NO. 5 ) Energy: at at a PUC,, -+ puc, -=ax ay aY Continuity: 2.0 lated by the method suggested by Churchill and Usagi (1972) as = 4.36[1 + (0. 376(X+)-0.33)6]1'6 (8) This correlation is in excellent agreement with the correlation 7 8 9 1 0 % J I --= 5.08 Variable Viscosity,"]. of Heat Transfer, 84. 353-362 (1962). Yang. K . T., "Laminar Forced Convcction of Liquids in Tuhes with Greek Letters p = isolxiric, coefficient of thernial expansion Y = -l / p d p / d t or -1/K d K / d t A = ( 3 n + 1 ) / 4 n P = dc-nhity P = viscosity tuber 15, 1980.

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