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Natural convection from a vertical surface covered with hair

Publication ,  Journal Article
Lage, JL; Bejan, A
Published in: International Journal of Heat and Fluid Flow
January 1, 1991

Heat transfer through a vertical skin surface covered with perpendicular hair strands of uniform density is investigated numerically. The heat transfer rate is the result of (1) direct heat transfer to the air that makes contact with the skin and (2) the heat conducted by each strand away from the skin. The hair strand and its surrounding air are not in local thermal equilibrium. Hair strands have the desirable effect of slowing the air that sweeps the vertical surface and the undesirable effect of acting as fins, thereby augmenting the overall heat transfer rate. Two distinct air flow models are considered: the Darcy model and the Forchheimer-Brinkman extended Darcy model. The overall heat transfer charts reported in this paper show that heat transfer rate can greatly exceed the estimate based on the traditional homogeneous porous medium model. By means of numerical examples, the Darcy model is shown to be adequate for modeling air flow through mammal hair. © 1991.

Duke Scholars

Published In

International Journal of Heat and Fluid Flow

DOI

ISSN

0142-727X

Publication Date

January 1, 1991

Volume

12

Issue

1

Start / End Page

46 / 53

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4012 Fluid mechanics and thermal engineering
  • 0915 Interdisciplinary Engineering
  • 0913 Mechanical Engineering
  • 0901 Aerospace Engineering
 

Citation

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Lage, J. L., & Bejan, A. (1991). Natural convection from a vertical surface covered with hair. International Journal of Heat and Fluid Flow, 12(1), 46–53. https://doi.org/10.1016/0142-727X(91)90007-I
Lage, J. L., and A. Bejan. “Natural convection from a vertical surface covered with hair.” International Journal of Heat and Fluid Flow 12, no. 1 (January 1, 1991): 46–53. https://doi.org/10.1016/0142-727X(91)90007-I.
Lage JL, Bejan A. Natural convection from a vertical surface covered with hair. International Journal of Heat and Fluid Flow. 1991 Jan 1;12(1):46–53.
Lage, J. L., and A. Bejan. “Natural convection from a vertical surface covered with hair.” International Journal of Heat and Fluid Flow, vol. 12, no. 1, Jan. 1991, pp. 46–53. Scopus, doi:10.1016/0142-727X(91)90007-I.
Lage JL, Bejan A. Natural convection from a vertical surface covered with hair. International Journal of Heat and Fluid Flow. 1991 Jan 1;12(1):46–53.
Journal cover image

Published In

International Journal of Heat and Fluid Flow

DOI

ISSN

0142-727X

Publication Date

January 1, 1991

Volume

12

Issue

1

Start / End Page

46 / 53

Related Subject Headings

  • Mechanical Engineering & Transports
  • 4012 Fluid mechanics and thermal engineering
  • 0915 Interdisciplinary Engineering
  • 0913 Mechanical Engineering
  • 0901 Aerospace Engineering