Theoretical analysis of the effect of isotropy on the effective diffusion coefficient in the porous and agglomerated phase of the electrodes of a PEMFC [PDF]
Scientific ReportsIn polymer membrane fuel cells (PEMFC), the pore microstructure and the effective diffusion coefficient ( $$D_{eff}$$ D eff ) of the catalytic layer have a significant impact on the overall performance of the fuel cell. In this work, numerical methods to
C. Pacheco +3 more
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Water Effective Diffusion Coefficient in Dairy Powder Calculated by Digital Image Processing and through Machine Learning Algorithms of CLSM Micrographs [PDF]
Foods, 2023 Rehydration of dairy powders is a complex and essential process. A relatively new quantitative mechanism for monitoring powders’ rehydration process uses the effective diffusion coefficient.
Valentyn A. Maidannyk +3 more
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Evaluating the effective diffusion coefficient of reactant gas in the catalyst layer of PEMFC using the fractal method considering the pore size distribution [PDF]
Nano Select, 2021 The pore size distribution of the catalyst layer (CL) significantly influences the effective diffusion coefficient (EDC) of the reactant gas due to the Knudsen diffusion effect in the proton exchange membrane fuel cell (PEMFC).
Yan Yin +4 more
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Impact of Pore Geometry and Water Saturation on Gas Effective Diffusion Coefficient in Soil [PDF]
Applied Sciences, 2018 Gas flow in soil plays a crucial role in terrestrial ecosystems, and numerical simulation of their movement needs to know their effective diffusion coefficients.
Wulong Hu +5 more
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Effective diffusion coefficients in reaction-diffusion systems with anomalous transport [PDF]
Physical Review E, 2019 We show that the Turing patterns in reaction systems with subdiffusion can be replicated in an effective system with Markovian cross-diffusion. The effective system has the same Turing instability as the original system, and the same patterns. If particles are short-lived, the transient dynamics are captured as well.
Joseph W. Baron, Tobias Galla
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Effective diffusion coefficient including the Marangoni effect [PDF]
The Journal of Chemical Physics, 2018 Surface-active molecules supplied from a particle fixed at the water surface create a spatial gradient of the molecule concentration, resulting in Marangoni convection. Convective flow transports the molecules far from the particle, enhancing diffusion.
Hiroyuki Kitahata, Natsuhiko Yoshinaga
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Estimation of Effective Diffusion Coefficient of O2 in Ash Layer in Underground Coal Gasification by Thermogravimetric Apparatus [PDF]
Energies, 2018 Underground coal gasification (UCG) proceeds generally in the presence of an ash layer on coal (or char) surface. The ash layer increases the mass transfer resistance of O2 to the gasification surface, which may become the limiting step of whole process.
Xi Lin, Qingya Liu, Zhenyu Liu
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Modelling effective diffusion for accurate NMR pore size analysis in nano- and microporous rocks [PDF]
Scientific ReportsLow-field NMR (LF-NMR) is a widely applied technique for evaluating pore size distribution (PSD) in porous materials. Conventional approaches typically assume surface-controlled spin-spin relaxation and negligible diffusion contributions under the fast ...
Michał Fajt +3 more
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Determining the effective hydrogen diffusion coefficient in 100Cr6 [PDF]
Materials and Corrosion, 2020 AbstractIn the present study, the diffusion constant for hydrogen in hardened 100Cr6 was measured in permeation tests. The tests were conducted on samples of different thicknesses. The diffusivity of hydrogen was also measured in prestrained samples to study the influence of plastic strain on the diffusion rate.
Dominik Kürten +2 more
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CHLORIDE EFFECTIVE DIFFUSION COEFFICIENT OF CONCRETE
, 2019 Doctor of Philosophy (PhD)
M. Shafikhani
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