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Analyse de l'amélioration du transfert de chaleur dans des échangeurs de chaleur à serpentins.

Analysis of heat transfer enhancement in coiled-tube heat exchangers.

Auteurs : ACHARYA N., SEN M., CHANG H. C.

Type d'article : Article

Résumé

The authors analyze the phenomenon of steady heat transfer enhancement due to chaotic particle paths in steady, laminar flow through a tube. The performances of two different coils, one with regular mixing and the other with chaotic mixing, are numerically analyzed and compared. For the latter case, axially periodic boundary conditions over a unit cell are used. Velocity vectors and temperature fields are computed. Flow fields and isotherms are examined to reveal the mechanisms of enhanced heat and momentum transfer through modification of the wall and internal boundary layers. Spatially varying local and constant bulk Nusselt numbers and bulk friction factors are determined for a range of governing parameters.

Détails

  • Titre original : Analysis of heat transfer enhancement in coiled-tube heat exchangers.
  • Identifiant de la fiche : 2002-1803
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 44 - n. 17
  • Date d'édition : 09/2001

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