Premium
Analysis of multicomponent diffusion in pore networks
Author(s) -
Sotirchos Stratis V.,
Burganos Vasilis N.
Publication year - 1988
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690340707
Subject(s) - isobaric process , ternary operation , diffusion , fick's laws of diffusion , porous medium , slab , diffusion equation , porosity , lattice (music) , eigenvalues and eigenvectors , materials science , thermodynamics , chemistry , physics , computer science , engineering , metric (unit) , operations management , quantum mechanics , geophysics , acoustics , programming language , composite material
Diffusion flux models are developed for isobaric diffusion of a multicomponent gas mixture in pore networks of distributed pore size and length constructed by arranging pore segments around the bonds of a lattice of constant coordination number. Eigenvalue‐eigevector analysis is used to decompose the dusty‐gas model equations, written for each pore segment in the network, into a set of independent single‐species diffusion problems, each of which is then treated by combining the effective medium theory for resistor networks with the smooth field approximation (Burganos and Sotirchos, 1987). Results for a ternary mixture diffusing in a porous slab show that direct application of the smooth field approximation underestimates significantly the mass transport resistance.