This paper presents the results of heat transfer measurement and analysis for two 5×5×1 cm porous channels. The channels were made of sintered bronze beads with two different mean diameters, dp=0.72 and 1.59 mm. The local wall temperature distribution, inlet and outlet pressures and temperatures, and heat transfer coefficients were measured for heat flux of 0.8, 1.6, 2.4, and 3.2 W/cm2 with air velocity ranging from 0.16 to 5 m/s and inlet air pressure of 1~3 atm. The measurement covers the data in both thermal entrance and thermally fully developed regions. The local Nusselt numbers were correlated in the fully developed region. The fully developed Nusselt numbers were analyzed theoretically by using a non-Darcy, two-equation flow model. Heat transfer between the solid and fluid phases was modeled by a relation of the form hloc=ARen. A wall function was introduced to model the transverse thermal dispersion process for the wall effect on the lateral mixing of fluid. The predicted fully developed Nusselt numbers are in good agreement with the measured values.
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Heat Transfer Measurement and Analysis for Sintered Porous Channels
G. J. Hwang,
G. J. Hwang
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, 30043
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C. H. Chao
C. H. Chao
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, 30043
Search for other works by this author on:
G. J. Hwang
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, 30043
C. H. Chao
Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu, Taiwan, 30043
J. Heat Transfer. May 1994, 116(2): 456-464 (9 pages)
Published Online: May 1, 1994
Article history
Received:
July 1, 1992
Revised:
July 1, 1993
Online:
May 23, 2008
Citation
Hwang, G. J., and Chao, C. H. (May 1, 1994). "Heat Transfer Measurement and Analysis for Sintered Porous Channels." ASME. J. Heat Transfer. May 1994; 116(2): 456–464. https://doi.org/10.1115/1.2911418
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