Modeling flow in disordered packed beds from pore-scale fluid mechanics

Network models are an effective means of incorporating pore‐scale heterogeneity into flow models of porous materials. The drawback to these models used to be the inability to obtain quantitative macroscopic parameters representing larger (experimental‐scale) media. However, recently developed modeli...

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Bibliographic Details
Published in:AIChE journal 1997-06, Vol.43 (6), p.1377-1389
Main Authors: Thompson, Karsten E., Fogler, H. Scott
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Exact sciences and technology
Heat and mass transfer. Packings, plates
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Summary:Network models are an effective means of incorporating pore‐scale heterogeneity into flow models of porous materials. The drawback to these models used to be the inability to obtain quantitative macroscopic parameters representing larger (experimental‐scale) media. However, recently developed modeling techniques, combined with more widely available computational resources, make the simulation of macroscopic parameters from a network approach viable. A network model for the slow flow of an incompressible fluid in disordered packed beds is presented. Fundamental fluid mechanics equations are solved at the pore scale and then translated to macroscopic behaviour using a network approach. The results reproduce experimental permeabilities and show excellent quantitative fits to residence time distributions for mechanical dispersion in real beds. Simulations of the RTD are of special interest, because they are definitive links between pore‐scale flow behavior and macroscopic responses.
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.690430602