ABSTRACT
In a multicomponent mixture, one component F diffuses into all other components that are stagnant (e.g., N
in an evaporation problem). Let Y
be the mass fraction of F and v
the absolute velocity of F. Then the average velocity of mixture, v, at any point in space is
Problem 6.2:
Prove that if species k is the only one to diffuse through a stagnant mixtures consisting of species A, B, C, etc., with binary diffusion coefficients of D
, D
, etc., then
=
where S is the stagnant medium.
