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Conduction thermique des surfaces irrégulières et fractales.

Heat conduction across irregular and fractal-like surfaces.

Auteurs : BLYTH M. G., POZRIKIDIS C.

Type d'article : Article

Résumé

The effect of irregularities on the rate of heat conduction from a two-dimensional isothermal surface into a semi-infinite medium is considered. The effect of protrusions, depressions, and surface roughness is quantified in terms of the displacement of the linear temperature profile prevailing far from the surface. This shift, coined the displacement length, is designated as an appropriate global measure of the effect of the surface indentations incorporating the particular details of the possibly intricate geometry. Families of polygonal wall shapes composed of segments in regular, irregular, and random arrangement are considered, and pre-fractal geometries consisting of large numbers of vertices are analysed. The results illustrate the effect of wall geometry on the flux distribution and on the overall enhancement in the rate of transport for regular and complex wall shapes.

Détails

  • Titre original : Heat conduction across irregular and fractal-like surfaces.
  • Identifiant de la fiche : 2004-0061
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 8
  • Date d'édition : 04/2003

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