Open Access

Table 7

Comparison of effective diffusion coefficients and tortuosity factors between numerical computation and NMR measurements on sample 1. For the sample 1, the De and D0 are respectively the diffusion coefficient of confined and free toluene measured by NMR. For the two-scale model, De and De(rg) are numerically estimated with the FFT method. is the effective diffusion coefficient compensated with the cylindrical-pore approximation by Equation (31). is the effective diffusion coefficient compensated with the partition effect by dilation, by Equation (32). τ′ and τ″ are respectively the corresponding tortuosity factors calculated from and .

Microstructure De 10−9 m2/s D0 10−9 m2/s 10−9 m2/s D0(rg) 10−9 m2/s 10−9 m2/s
Sample 1 1.05 2.40 2.29
Two-scale model 0.508 1 1.96 0.46 2.19 0.453 0.427 2.34

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.