Title: Micro-scale fluid model for drying of highly porous particle aggregates
Authors : Kharaghani, Abdolreza
Kirsch, Christoph
Metzger, Thomas
Tsotsas, Evangelos
Published in : Computers & chemical engineering
Volume(Issue) : 52
Pages : 46
Pages to: 54
Publisher / Ed. Institution : Elsevier
Issue Date: 2013
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (publication)
Language : German
Subject (DDC) : 660: Chemical engineering
Abstract: 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
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Article in scientific journal
DOI : 10.1016/j.compchemeng.2012.12.003
ISSN: 0098-1354
1873-4375
URI: https://digitalcollection.zhaw.ch/handle/11475/12350
Appears in Collections:Publikationen School of Engineering

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