Mass Diffusion Fluxes for Mixtures of Chemical Species

5 Mass Diffusion Fluxes for Mixtures of Chemical Species 

The Pick s first law of binary diffusion [40], proposed by Pick in 1855, expresses the mass flux as a negative function of the driving force, is defined by  

This mass diffusion flux relation serves as basis for the generalized Pickian multi-component formulations. 

2 Generalized Pick s First Law Based on Kinetic Theory 

Numerous generalized Pickian mass diffusion flux models have been proposed based on the concept of kinetic theory. Pour such models are outlined in this subsection. 

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