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Network models for capillary porous media: application to drying technology
Author(s) -
Metzger T.,
Tsotsas E.
Publication year - 2010
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201000023
Subject(s) - capillary action , porous medium , materials science , network model , shrinkage , porosity , process (computing) , mechanics , heat transfer , diffusion , multiphase flow , mass transfer , flow (mathematics) , range (aeronautics) , computer science , thermodynamics , composite material , physics , database , operating system
Network models offer an efficient pore‐scale approach to investigate transport in partially saturated porous materials and are particularly suited to study capillarity. Drying is a prime model application since it involves a range of physical effects: capillary pumping, viscous liquid flow, phase transition, vapor diffusion, heat transfer, but also cracks and shrinkage. This review article gives an introduction to this modern technique addressing required model input, sketching important elements of the computational algorithm and commenting on the nature of simulation results. For the case of drying, it is illustrated how network models can help analyze the influence of pore structure on process kinetics and gain a deeper understanding of the role of individual transport phenomena. Finally, a combination of pore network model and discrete element method is presented, extending the application range to mechanical effects caused by capillary forces.