Titel: Micro-scale fluid model for drying of highly porous particle aggregates
Autor/-in: Kharaghani, Abdolreza
Kirsch, Christoph
Metzger, Thomas
Tsotsas, Evangelos
Erschienen in: Computers & chemical engineering
Band(Heft): 52
Seiten: 46
Seiten bis: 54
Verlag / Hrsg. Institution: Elsevier
Erscheinungsdatum: 2013
Lizenz (gemäss Verlagsvertrag): Lizenz gemäss Verlagsvertrag
Art der Begutachtung: Peer review (Publikation)
Sprache: Deutsch
Fachgebiet (DDC): 660: Technische Chemie
Zusammenfassung: A discrete three-dimensional model for the fluid flow and phase transition at the microscopic scale during convective drying of highly porous particle aggregates has been developed. The phase distributions are described by time-dependent cell volume fractions on a stationary cubic mesh. The solid phase volume fractions are computed from an arbitrary collection of spherical primary particles generated by gravitational deposition using the discrete element method. The volume of fluid method is used to track the liquid–gas interface over time. Local evaporation rates are computed from a finite difference solution of a vapor diffusion problem in the gas phase, and the liquid–gas interface dynamics is described by volume-conserving mean curvature flow, with an additional equilibrium contact angle condition along the three-phase contact lines. The evolution of the liquid distribution over time for different wetting properties of the solid surface as well as binary liquid bridges between solid particles are presented.
Departement: School of Engineering
Organisationseinheit: Institute of Computational Physics (ICP)
Publikationstyp: Beitrag in wissenschaftlicher Zeitschrift
DOI: 10.1016/j.compchemeng.2012.12.003
ISSN: 0098-1354
1873-4375
URI: https://digitalcollection.zhaw.ch/handle/11475/12350
Enthalten in den Sammlungen:Publikationen School of Engineering

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