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TECHNICAL PAPERS: Porous Media

Empirical Evaluation of Convective Heat and Moisture Transport Coefficients in Porous Cotton Medium

[+] Author and Article Information
Kamel Ghali

Beirut Arab University, Faculty of Engineering, Beirut, Lebanone-mail: amro@aub.edu.lb

Nesreen Ghaddar

American University of Beirut, Faculty of Engineering and Architecture, P.O. Box 11-236, Riad ElSolh, Beirut 1107 2020, Lebanone-mail: farah@aub.edu.lb

Byron Jones

Kansas State University, College of Engineering, 148 Rathbone Hall, Manhattan, KS 66506-5202e-mail: jones@ksu.edu

J. Heat Transfer 124(3), 530-537 (May 10, 2002) (8 pages) doi:10.1115/1.1471524 History: Received February 07, 2001; Revised January 25, 2002; Online May 10, 2002
Copyright © 2002 by ASME
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References

Henry,  P. S. H., 1939, “Diffusion in Absorbing Media,” Proc. R. Soc. London, Ser. A, 171A, pp. 215–241.
Nordan,  P., and David,  H. G., 1967, “Coupled Diffusion of Moisture and Heat in Hygroscopic Textile Mafariah,” Int. J. Heat Mass Transf., 10, pp. 853–866.
Li,  Y., and Holcombe,  B. V., 1992, “A Two Stage Sorption Model of the Coupled Diffusion of Moisture and Heat in Wool Fabrics,” Text. Res. J., 62(4), pp. 211–217.
Farnworth,  B., 1986, “A Numerical Model of Combined Diffusion of Heat and Water Vapor Through Clothing,” Textile Res. Inst., 56, pp. 653–655.
Jones,  B. W., and Ogawa,  Y., 1993, “Transient Interaction Between the Human and the Thermal Environment,” ASHRAE Trans., 98, Part 1, pp. 189–195.
Minkowycz,  W. J., Haji-Sheikh,  A., and Vafai,  K., 1999, “On Departure From Local Thermal Equilibrium in Porous Media Due to a Rapidly Changing Heat Source: The Sparrow Number,” Int. J. Heat Mass Transf., 42, pp. 3373–3385.
Gibson, P. 1996, “Governing Equations for Multiphase Heat and Mass Transfer in Hydroscopic Porous Media With Applications to Clothing Materials,” Technical Report NATICK/TR-95/004 by United States Army Natick Research, pp. 105; 115–117.
Gibson,  P., Kendrick,  C., Rivin,  D., Sicuranza,  L., and Charmchi,  M., 1995, “An Automated Water Vapor Diffusion Test Method for Fabrics, Laminates, and Films,” Journal of Coated Fabrics, 24.
Gibson, P., and Charmchi, M., 1996, “Convective and Diffusive Energy and Mass Transfer in Hygroscopic Porous Textile Materials,” Proceedings of the 1996 International Congress & Exposition, ASME Winter Annual Meeting, No. 96-WA/HT-27, Atlanta, GA, November 17–22.
Gibson,  P., and Charmchi,  M., 1997, “The Use of Volume-Averaging Techniques to Predict Temperature Transients Due to Water Vapor Sorption in Hygroscopic Porous Polymer Materials,” J. Appl. Polym. Sci., 64, pp. 493–505.
Gibson,  P., and Charmchi,  M., 1997, “Coupled Heat and Mass Transfer Through Hygroscopic Porous Materials—Application to Clothing Layers,” J. of the Society of Fiber Science and Technology, Japan, 35, pp. 183–194.
Harter, K. L., Spivak, S. M., and Vigo, T. L., 1981, “Applications of the Trace Gas Technique in Clothing Comfort.” Textile Research, 51 , pp. 345–355.
Lotens, W., 1993, “Heat Transfer from Humans Wearing Clothing,” Doctoral thesis, published by TNO Institute for Perception, Soesterberg, The Netherlands, pp. 34–37.
Holman, J. P. 1997, Heat Transfer, McGraw-Hill, 8th ed., New York, p. 488, Ch. 8.
Zhao J., 1995, “Computer Modeling for Estimation of Effect of Walking on Clothing Insulation,” M. S. thesis, Kansas State University, Manhattan, KS.
Mortan, W. E., and Hearle, L. W., 1975, Physical Properties of Textile Fibers, Heinemann, London.
ASHRAE Handbook of Fundamentals, 1997, American Society of Heating, Refrigerating and Air conditioning Engineers, Atlanta.
Oohori,  T., Brglund,  L. G., and Gagge,  A. P., 1985, “Comparison of Current Two Parameters Indices of Vapor Permeation of Clothing—As Factors Governing Thermal Equilibrium and Human Comfort,” ASHRAE Trans., 90, Part II, pp. 85–101.
Hyland,  R. W., and Wexler,  A., 1983, “Formulations for the Thermodynamic Properties of the Saturated Phases of H2O From 173.15 K to 473.15 K,” ASHRAE Trans., 89, pp. 500–519.
Walpole, R. E., and Meyers, R. 1985, Probability and Statistics for Engineers and Scientists, Third Edition, Collier Macmillan, New York, p. 347.

Figures

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A cylindrical representation of the two-node model as cross flow over cylinders
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A schematic of the experimental setup and the Styrofoam box
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The average regain relative error at the flow rates per unit area of 0.0067, 0.018, and 0.045 m3 /sec.m2 for different values of Hco at icl=0.4 and γ=0.6
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A plot of the predicted total regain and the measured regain as a function of time at different flow rates.
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(a) The predicted regain at optimal Hco,0.8Hco, and 1.2Hco at the flow rates of 0.0067, 0.018, and 0.045 m3 /sec.m2
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The predicted inner and outer node temperatures and the measured fabric temperatures as a function of time at the flow rates of (a) 0.0067 m3 /sec.m2 , (b) 0.018 m3 /sec.m2 , and (c) 0.045 m3 /sec.m2
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Plot of the heat transfer coefficients obtained from the experimental model and from the cross flow model at Do/tf=0.5

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