Guide alphabétique, de la thermodynamique, amplification de chaleur, transfert de masse, et dynamique des fluides
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The Lewis Number (Le) is defined as the ratio of the Schmidt Number (Sc) and the Prandtl Number (Pr). The Lewis Number is also the ratio of thermal diffusivity and molecular diffusivity as is found from the definitions of Schmidt and Prandtl Number, as follows:

(1)

where κ = (λ/ρcp) is the Thermal Diffusivity. The Lewis Number is important in determining the relationship between mass and heat transfer coefficients (the Lewis Relationship).

Nombre de vues : 36238 Article ajouté : 2 February 2011 Dernière modification de l'article : 11 February 2011 © Copyright 2010-2021 Retour en haut de page