Unsteady Diffusion Away from an Interface

The concentration boundary layer is rarely at steady state. The only transport mechanism away from the interface is diffusion, and diffusion is a slow process. We will practice dealing with unsteady diffusion away from an interface with Example 8.5. 

EXAMPLE 8.5 Unsteady diffusion away from an interface 

Water with 0.55 g/vcf toxaphene is in contact with quiescent air. Estimate the growth of the concentration boundary layer in the air over time. 

An analytical solution is known to this problem under two conditions  

the resistance to transport in one phase is negligible, compared with the resistance in the other phase, or 

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See also in sourсe #XX -- [ ]

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