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Journal of Porous Media
Fator do impacto: 1.752 FI de cinco anos: 1.487 SJR: 0.43 SNIP: 0.762 CiteScore™: 2.3

ISSN Imprimir: 1091-028X
ISSN On-line: 1934-0508

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Journal of Porous Media

DOI: 10.1615/JPorMedia.v4.i4.60
10 pages

Heat Transfer to Power-Law Fluid Flows Through Porous Media

B. K. Rao
College of Engineering, Tdaho State University, Pocatello, Idaho 83209

RESUMO

Heat transfer and pressure drop were measured for flow of aqueous solutions of Carbopol 934® through a vertical tube filled with porous media. The heated stainless steel test section has an inside diameter of 2.25 cm, and is 200 diameters long. The porosity was varied from 0.32 to 0.68 by using uniform spherical glass beads. Uniform heat flux thermal boundary condition was imposed by passing direct electric current through the tube wall. Over a range of: 45 < Rea < 7000, 21 < Pra < 58, 0.62 < n < 0.80, 1.6 < D/d < 4.5, and the polymer concentration from 250 to 500 parts per million, the friction factor data agreed with the Newtonian prediction. Heat transfer to power-law fluids increases with increasing Rea and Pra, and decreasing porosity. A new correlation was proposed for predicting the heat transfer to power-law fluid flows through confined porous media.


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