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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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.
Kitahata, Hiroyuki, Yoshinaga, Natsuhiko
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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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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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Mathematical Model for Effective Gas Diffusion Coefficient in Multi-scale Fractal Porous Media [PDF]
E3S Web of Conferences, 2021 Based on the capillary hypothesis and fractal theory, a mathematical model for calculating the effective gas diffusion coefficient in porous media is established. By using fractal geometry theory, pore area fractal dimension, tortuosity fractal dimension
Zhehua Du
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Frontiers in Materials, 2022 In this work, we propose an efficient numerical method to study the effects of microstructures on the effective diffusion coefficient of the diffusion component in materials. We take the diffusion of hydrogen (H) atoms in porous polycrystalline tungsten (
Bingchen Li +13 more
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Chemical Engineering Journal Advances, 2023 Accurate measurement of the gas diffusivity in a gas diffusion layer (GDL) for polymer electrolyte fuel cells (PEFCs) is extremely important in order to improve the performance of PEFCs and design fuel cell stacks.
Masahide Inagaki +2 more
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Calculation of the effective diffusion coefficient during the drying of clay samples [PDF]
Journal of the Serbian Chemical Society, 2012 The aim of this study was to calculate the effective diffusion coefficient based on experimentally recorded drying curves for two masonry clays obtained from different localities.
Vasić Miloš +2 more
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Polymer Testing, 2021 A fast manometric method has been designed for determining the oxygen transfer rate through cork stoppers. Thanks to this technique, it is possible to measure the effective diffusion coefficient of oxygen through a thin cork wafer in a few days, whereas ...
Julie Chanut +6 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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