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          Institute: MPI für Dynamik komplexer technischer Systeme     Collection: Physical and Chemical Foundations of Process Engineering     Display Documents



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ID: 13771.0, MPI für Dynamik komplexer technischer Systeme / Physical and Chemical Foundations of Process Engineering
Influence of stagnant zones on transient and asymptotic dispersion in macroscopically homogeneous porous media
Authors:Kandhai, D.; Hlushkou, D.; Hoekstra, A. G.; Sloot, P. M. A.; Van As, H.; Tallarek, U.
Language:English
Date of Publication (YYYY-MM-DD):2002-06-10
Title of Journal:Physical Review Letters
Journal Abbrev.:Phys. Rev. Lett.
Volume:88
Issue / Number:23
End Page:234501
Sequence Number of Article:234501
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:The role of stagnant zones in hydrodynamic dispersion is studied for creeping flow through a fixed bed of spherical permeable particles, covering several orders of characteristic time and length scales associated with fluid transport. Numerical simulations employ a hierarchical model to cope with the different temporal and spatial scales, showing good agreement with our experimental results on diffusion-limited mass transfer, transient, and asymptotic longitudinal dispersion. These data demonstrate that intraparticle liquid holdup in macroscopically homogeneous porous media clearly dominates over contributions caused by the intrinsic flow field heterogeneity and boundary-layer mass transfer.
External Publication Status:published
Document Type:Article
Communicated by:Andreas Seidel-Morgenstern
Affiliations:MPI für Dynamik komplexer technischer Systeme/Physical and Chemical Foundations of Process Engineering
External Affiliations:Univ Wageningen & Res Ctr, Mol Phys Lab, Dreijenlaan 3, NL-6703 HA Wageningen, Netherlands; Univ Magdeburg, Lehrstuhl Chem Verfahrenstech, D-39106 Magdeburg, Germany; Univ Amsterdam, Fac Sci, Sect Computat Sci, NL-1098 SJ Amsterdam, Netherlands; Delft Univ Technol, Fac Sci Appl, Kramers Lab Fys Technol, NL-2628 BW Delft, Netherlands; Belarussian State Univ, Dept Syst Anal, Minsk 220050, Byelarus
Identifiers:ISI:000175860500029
ISSN:0031-9007
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