Title: Numerical simulation of reactive transport phenomena in the hexis SOFC-system
Authors : Safa, Yasser
Hocker, Thomas
Proceedings: Solid Oxide Fuel Cells 11 (SOFC-XI)
Volume(Issue) : 25
Pages : 1221
Pages to: 1230
Conference details: Eleventh International Symposium on Solid Oxide Fuel Cells (SOFC-XI), Vienna, Austria, 4–9 October 2009
Editors of the parent work: Singhal, S. C.
Yokokawa, H.
Publisher / Ed. Institution: Pennington, NJ
Issue Date: 2009
License (according to publishing contract) : Licence according to publishing contract
Series : ECS Transactions
Series volume: 25, 2
Type of review: Not specified
Language : English
Subjects : Reactive flow; Chagre transport; Compressible flow; Slip velocity
Subject (DDC) : 530: Physics
621.3: Electrical engineering and electronics
Abstract: An advanced computational reactive flow code has been implemented into Mathematica® to analyze (electro-)chemical conversions and various transport phenomena in the Hexis® SOFC-stack. The finite element approximation is applied for the space discretization of the continuity equations. The convection dominant cases are stabilized by the SUPG (Streamline Upwind Petrov Galerkin) method. The fluid flow in the interconnect channels is derived analytically with accurate representation of the slip velocity on the porous electrode surfaces. The mathematical system is linearized by means of a pseudo-time step discretization via a semi-implicit scheme. This stable iterative procedure is applied to an evolutionary problem and it converges unconditionally to the steady solution. Due to the low aspect ratio of the thickness to the cross-section of the cell, a one-dimensional model of the cell is coupled with the flow inside the gas channels. This approach reduces the computing time by retaining the main geometric details.
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Publication type: Conference Paper
DOI : 10.1149/1.3205651
ISBN: 978-1-56677-739-1
ISSN: 1938-5862
URI: https://digitalcollection.zhaw.ch/handle/11475/1655
Appears in Collections:Publikationen School of Engineering

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