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LEWIS NUMBER

DOI: 10.1615/AtoZ.l.lewis_number

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 : 28079 Article ajouté : 2 February 2011 Dernière modification de l'article : 11 February 2011 © Copyright 2010-2019 Retour en haut de page