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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/8309

Title: Threshold fine-tuning and 3D characterisation of porous media using X-ray nanotomography
Authors: Ostadi, Hossein
Jiang, Kyle
Rama, Pratap
Liu, Yu
Chen, Rui
Zhang, Xiaoxian
Keywords: X-ray nanotomography
Gas diffusion layer (GDL)
Fuel cell
Porous material
Threshold
Lattice Boltzmann (LB)
Issue Date: 2010
Publisher: © Bentham Science
Citation: OSTADI, H.... et al., 2010. Threshold fine-tuning and 3D characterisation of porous media using X-ray nanotomography. Current Nanoscience, 6(2), pp. 226-231
Abstract: A common challenge in the X-ray nanotomography of porous media, such as fuel cell gas diffusion layers (GDLs), is to binarize nanotomography greyscale images in order to differentiate between solids and voids for structural characterisation and numerical flow analysis. In the process threshold determination is critical. This paper presents a study on determination of and fine-tuning threshold value based on comparison of material porosity and average fibre diameter obtained from nanotomography images with porosity data from density experiments and average fibre diameter achieved from scanning electron microscopy images respectively. The more accurate 3D reconstructed model is then used to calculate pore size distribution and average pore size, while the gas permeability of the representative 3D binary images are calculated using a single phase Lattice Boltzmann (LB) model in the D3Q19 regime.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/8309
Publisher Link: http://www.benthamscience.com/cnano/
ISSN: 1573-4137
Appears in Collections:Published Articles (Aeronautical and Automotive Engineering)

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