Binary and ternary isothermal gas mixtures

Example 6.7 Binary and ternary isothermal gas mixtures For a binary mixture of gases under isothermal and isobaric conditions and without shear forces, from Eq. (6.213) we have 

For a ternary mixture under the same conditions, we have 

From the inversion, we then have the diffusion coefficients defined by 

Example 6.8 Diffusion in a dilute isothermal gas mixture Suppose that in a gas mixture, component n is in abundance and other components are in trace amounts. Then, we have pn p, c T PpLn - 0, c F = 1, and for a steady transport, Eq. (6.208) becomes the Navier-Stokes equation for the single component, x, - 0, i = n. 

This equation can be solved with appropriate boundary conditions. 

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