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Modélisation de la formation de givre et des propriétés du givre produit par l'écoulement d'air au-dessus d'une plaque plane.

Modelling of frost growth and frost properties with airflow over a flat plate.

Auteurs : YUN R., KIM Y., MIN M. K.

Type d'article : Article, Article de la RIF

Résumé

A physical model of frost layer growth and frost properties with airflow over a flat plate at subfreezing temperature was developed. Frost roughness was measured, and an empirical correlation for the average frost roughness was suggested. Heat and mass transfer coefficients were calculated using the modified Prandtl mixing-length scheme containing the effects of both frost roughness and turbulent boundary layer thickness. Frost thermal conductivity was theoretically analyzed by solving the combined equations of air equivalent conductivity and thermal conductivity of the frost inner layer. Based on the present model, heat and mass transfer coefficient, frost thermal conductivity, frost thickness, frost mass concentration and frost density with time and space were estimated. The model showed good agreement with the basic trends of the test data taken from other literature. Spatial and temporal changes of heat flux and frost surface temperature were also investigated.

Documents disponibles

Format PDF

Pages : 362-371

Disponible

  • Prix public

    20 €

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    Gratuit

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Détails

  • Titre original : Modelling of frost growth and frost properties with airflow over a flat plate.
  • Identifiant de la fiche : 2003-0028
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 25 - n. 3
  • Date d'édition : 05/2002

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