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Download fileInfluence of threshold variation on determining the properties of a polymer electrolyte fuel cell gas diffusion layer in X-ray nano-tomography
journal contribution
posted on 2011-04-20, 16:19 authored by Hossein Ostadi, Kyle Jiang, Pratap Rama, Yu Liu, Rui Chen, Xiaoxian ZhangMorphological parameters of a 3D binary image of a porous carbon gas diffusion layer (GDL) for
polymer electrolyte fuel cells (PEFC) reconstructed using X-ray nano-tomography scanning have
been obtained, and influence of small alterations in the threshold value on the simulated flow
properties of the reconstructed GDL has been determined. A range of threshold values with 0.4%
increments on the greyscale map have been applied and the gas permeability of the binary images
have been calculated using a single-phase lattice Botlzmann model (LBM), which is based on the
treatment of nineteen velocities in the three dimensional domain (D3Q19). The porosity, degrees of
anisotropy and the mean pore radius have been calculated directly from segmented voxel
representation. A strong relationship between these parameters and threshold variation has been
established. These findings suggest that threshold selection can significantly affect some of the flow
properties and may strongly influence the computational simulation of micro and nano-scale flows in a
porous structure.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
OSTADI, H....et al. 2010. Influence of threshold variation on determining the properties of a polymer electrolyte fuel cell gas diffusion layer in X-ray nano-tomography. Chemical Engineering Science, 65(6), pp 2213-2217Publisher
© ElsevierVersion
- AM (Accepted Manuscript)
Publication date
2010ISSN
0009-2509Publisher version
Language
- en