Topic
Mass diffusivity
About: Mass diffusivity is a research topic. Over the lifetime, 510 publications have been published within this topic receiving 11765 citations. The topic is also known as: diffusivity & mass diffusivity.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this paper, the formation and distribution of condensed water in diffusion medium of proton exchange membrane fuel cells, and its tendency to reduce the local effective mass diffusivity and to influence cell performance, are studied.
1,014 citations
TL;DR: In this paper, a digital image-based model of the microstructure of Portland cement paste, coupled with exact transport algorithms, is used to study the diffusivity of cement paste.
Abstract: A digital image-based model of the microstructure of cement paste, coupled with exact transport algorithms, is used to study the diffusivity of Portland cement paste. The principal variables considered are water∶cement ratio, degree of cement hydration and capillary porosity. Computational methods are described and diffusivity results are presented, which are found to agree with the available experimental measurements within experimental error. Model cement pastes prepared with different water∶cement ratios, and having different degrees of hydration, are found to have diffusivities that lie on a single master curve when plotted as a function of capillary porosity. Concepts from percolation theory are used to explain quantitatively the dependence of diffusivity on capillary porosity. The effect of silica fume addition on diffusivity is also examined.
407 citations
TL;DR: In this paper, the authors evaluate experimentally the drying kinetics of agricultural products as a function of drying conditions and evaluate the diffusion coefficient of grapes grown on both sides of the Mediterranean sea.
305 citations
TL;DR: In this article, a free-volume theory of polymer-solvent diffusion coefficients is proposed and evaluated using experimental diffusivity data collected over wide temperature and concentration ranges, showing that the theory accurately predicts the large temperature variations typically observed for polymer solvents diffusion coefficients.
Abstract: A revised version of a recently proposed free-volume theory of polymer-solvent diffusion is introduced and evaluated using experimental diffusivity data collected over wide temperature and concentration ranges. The theory accurately predicts the large temperature and concentration variations typically observed for polymer-solvent diffusion coefficients.
282 citations
TL;DR: In this article, a modified-film model developed using the boundary layer concept described the external (ECP) layer much better than previously used models, and the predicted water flux due to ICP was in excellent agreement with experimental flux data.
254 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 2 |
| 2024 | 6 |
| 2023 | 12 |
| 2022 | 25 |
| 2021 | 8 |
| 2020 | 12 |