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The calculations of dispersion coefficients inside two-dimensional randomly packed beds of circular particles
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Architecture and Water.ORCID iD: 0000-0003-0520-796X
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2013 (English)In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 59, no 3, p. 1002-1011Article in journal (Refereed) Published
Abstract [en]

The longitudinal (DL) and transverse (DT) dispersion coefficients in two-dimensional (2D) randomly packed beds of circular particles in a laminar flow regime are derived. A 2D discrete system of particles is divided into cells using modified Voronoi diagrams. The relationship between the variation of the stream function and the averaged vortictiy is obtained from Computational Fluid Dynamics simulations. The whole flow pattern is then obtained by using the principle of energy dissipation rate minimization. The obtained values of DL agree well with 3D experimental data for all velocities investigated. At very high velocities, DT in 2D appears to be higher than 3D experimental data. In addition, the effects of particle size distribution, packing structure, and porosity on the DL and DT were studied. One result was that an increase in the width of the particle size distribution resulted in higher values of DL and DT at high velocities.

Place, publisher, year, edition, pages
2013. Vol. 59, no 3, p. 1002-1011
National Category
Fluid Mechanics and Acoustics Water Engineering
Research subject
Fluid Mechanics; Urban Water Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-15564DOI: 10.1002/aic.13867ISI: 000317465700029Scopus ID: 2-s2.0-84874550203Local ID: f189f5ee-4d38-4284-9091-cb7ca93e65a2OAI: oai:DiVA.org:ltu-15564DiVA, id: diva2:988538
Note
Validerad; 2013; 20120604 (amijou)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-07-10Bibliographically approved

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Jourak, AmirFrishfelds, VilnisLundström, T. StaffanHerrmann, IngaHedström, Annelie

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