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Effets de la poussée dans un écoulement plat Couette chauffé uniformément par dessous avec un flux thermique constant.

Buoyancy effects in plane Couette flow heated uniformly from below with constant heat flux.

Auteurs : CHOI C. K., CHUNG T. J., KIM M. C.

Type d'article : Article

Résumé

The onset of buoyancy-driven convection in plane Couette flow heated uniformly from below was analysed theoretically. For the thermal entrance region, a new set of stability equations involving streamwise variations of disturbances are derived based on the linear theory, the scaling relations and the extended momentary instability concept. It was shown that the critical Rayleigh number that marks the onset of longitudinal vortex rolls increases with a decrease in Prandtl number. Based on the present stability criteria a new mixed convection heat transfer correlation is derived for the whole range of Rayleigh number. The analysis predicted the available experimental data of water rather well.

Détails

  • Titre original : Buoyancy effects in plane Couette flow heated uniformly from below with constant heat flux.
  • Identifiant de la fiche : 2004-2143
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 12-13
  • Date d'édition : 06/2004

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