Internal heat transfer to power-law fluid flows through porous media
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作者:
Rao, B.K.
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机构:College of Engineering, Idaho State University, Pocatello, ID 83209, United States
Rao, B.K.
McDevitt, J.P.
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机构:College of Engineering, Idaho State University, Pocatello, ID 83209, United States
McDevitt, J.P.
Vetter, D.L.
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机构:College of Engineering, Idaho State University, Pocatello, ID 83209, United States
Vetter, D.L.
机构:
[1] College of Engineering, Idaho State University, Pocatello, ID 83209, United States
[2] BBWI, P. O. Box 1625, Idaho Falls, ID 83415-7129, United States
来源:
American Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
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2000年
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366卷
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摘要:
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 bypassing direct electric current through the tube wall. Over a range of the parameters: 45 less than or equal Rea less than or equal 7,000, 2I less than or equal Pra less than or equal 58, 0.62 less than or equal n (power-law exponent) less than or equal 0.80, 0.22 less than or equal d/D less than or equal 0.6, and the polymer concentration from 250 to 500 parts per million, the friction factor data for power-law fluids agreed with the Newtonian predictions. Heat transfer to power-law fluids increases with increasing Rea and Pra and decreasing porosity. A new correlation was proposed for predicting heat transfer to power-law fluid flows through confined porous media.