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Lewis number is a dimensionless number defined as the ratio of thermal diffusivity to mass diffusivity. It is used to characterize fluid flows where there is simultaneous heat and mass transfer by convection.
Additional recommended knowledge
It is defined as:
where α is the thermal diffusivity and D is the mass diffusivity.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lewis_number". A list of authors is available in Wikipedia.|