Species A diffuses from a solid to a semi-infinite body of liquid B above it. Assume the density and mass diffusivity ar

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Species A Diffuses From A Solid To A Semi Infinite Body Of Liquid B Above It Assume The Density And Mass Diffusivity Ar 1 (29.88 KiB) Viewed 25 times

Species A diffuses from a solid to a semi-infinite body of liquid B above it. Assume the density and mass diffusivity are constants. This diffusion process can be described by the one-dimensional version of Fick's second law. Initially, there is no A present in liquid B, and the concentration of A at the solid-liquid interface in CAO- Let z be the coordinate with its origin located at the solid-liquid interface and its positive direction pointing into liquid B. Let D be the mass diffusivity of the binary system and t be the time. Please express the concentration profile of A. z → ∞0, CA = 0 NA semi-infinite liquid B 2=0, Ca Cao Z solid