Fig. 3 | Scientific Reports

Fig. 3

From: Estimation of the apparent anisotropic water diffusivity on spruce evaluated with a simplified derivative approach and as a function of the flow rate

Fig. 3

Apparent diffusion coefficient Dapp as a function of the flow rate Q for the three wood directions, i.e., (a) L, (b) R, and (c) T, obtained from the different methods, i.e., derivative (DER; black filled circle), double-stretched exponential (DSE; red filled circle – fast diffusion process DSE-1; orange filled circle), lifetime (t0.63; blue filled circle), Ritger-Peppas (RP; green star), Fickian series (SUM; black empty circle), double-Fickian series (DSUM; red empty circle), and half-life time (t0.5; blue empty circle). (d) Relative apparent diffusion coefficient between the values obtained from the DER method compared to the other methods for the different flow rate values and wood directions. Note: the number below each group is the average value.

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