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Cylindres multiéchelles à écoulement croisé.

Constructual multi-scale cylinders in cross-flow.

Auteurs : BELLO-OCHENDE T., BEJAN A.

Type d'article : Article

Résumé

This article reports a new concept for maximizing heat transfer density in assemblies of cylinders in cross-flow: the use of cylinders of several sizes, and the optimal placement of each cylinder in the assembly. The paper reports the optimized flow architectures and performance for structures with 1, 2 and 3 cylinder sizes, which correspond to structures with 1, 2 and 4 degrees of freedom. The heat transfer rate density increases (with diminishing returns) as the optimized structure becomes more complex. The optimized cylinder diameters are relatively robust, i.e., insensitive to changes in complexity and flow regime (pressure difference). The optimized spacings decrease monotonically as the driving pressure difference increases. The multi-scale flow architectures optimized in this paper have features and qualities similar to tree-shaped (dendritic) designs, where the length scales are numerous, hierarchically organized, and nonuniformly distributed through the available space.

Détails

  • Titre original : Constructual multi-scale cylinders in cross-flow.
  • Identifiant de la fiche : 2005-1718
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 48 - n. 7
  • Date d'édition : 03/2005

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