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Visualisation de l'écoulement par convection naturelle dans un cylindre vertical d'eau proche de la densité maximale.

Flow visualization of free convection in a vertical cylinder of water in the vicinity of the density maximum.

Auteurs : CAWLEY M. F., MCBRIDE P.

Type d'article : Article

Résumé

Free convection in a vertical cylinder of water was studied in the vicinity of the density maximum at 4 °C. Results are presented both from cooling curve measurements (using a series of thermistors along the central axis of the cylinder) and from flow visualization experiments (using particle image velocimetry), and a comparison is made with simulations. The reversal of the overall flow direction as the temperature crosses the maximum density region gives rise to a plateau feature in the cooling curve, which may be explained by the formation of a rising toroidal structure along the column boundary. This feature effectively diverts flow away from the inner region of the cylinder, resulting in a temporary cessation of convective cooling within this region.

Détails

  • Titre original : Flow visualization of free convection in a vertical cylinder of water in the vicinity of the density maximum.
  • Identifiant de la fiche : 2004-1625
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 6-7
  • Date d'édition : 03/2004

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