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. 2020 Oct 4;230:116188. doi: 10.1016/j.ces.2020.116188

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Fig. 12 — Dispersion of a solute in a tube: map of controlling mechanisms in terms of Peclet number, Pe vs dimensionless time $Dt / r_{0}^{2}$ (adapted from R. Aris, Mathematical modeling techniques, Dover, New York, 1994 with permission).