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Structures pour le transport des fluides, de la chaleur et des contaminants de la convection mixte laminaire à double diffusion dans une enceinte ventilée à deux dimensions.

Fluid, heat and contaminant transport structures of laminar double-diffusive mixed convection in a two-dimensional ventilated enclosure.

Auteurs : DENG Q. H., ZHOU J., MEI C., et al.

Type d'article : Article

Résumé

The objective of the present work was to investigate the characteristics of the airflow and heat/contaminant transport structures in the indoor air environment by means of a convection transport visualization technique. Laminar double-diffusive mixed convection in a two-dimensional displacement ventilated enclosure with discrete heat and contaminant sources is numerically studied. Based on the governing equations, the fluid, heat, and contaminant transport processes are respectively described by the corresponding stream, heat and mass functions. The authors analysed the effects of the main factors, the strength of heat source indicated by the Grashof number, the strength of contaminant source by the buoyancy ratio, the strength of ventilation by the Reynolds number, and the ventilation mode, on the indoor air environment. Numerical results, presented by the contour function lines, namely, stream, heat and mass lines, illustrated that the indoor air, heat and contaminant transport structures are mainly determined by the interaction between the internal buoyancy natural convection induced by the discrete heat/contaminant sources and the external forced convection driven by the mechanical ventilation. It is found that the convection transport method could explicitly disclose the complicated philosophy of indoor air environment, and thus provides a simple but practical approach to see the indoor airflow and heat and contaminant transport structures.

Détails

  • Titre original : Fluid, heat and contaminant transport structures of laminar double-diffusive mixed convection in a two-dimensional ventilated enclosure.
  • Identifiant de la fiche : 2005-0939
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 24
  • Date d'édition : 11/2004

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