The relation between osmotic flow and tracer solvent diffusion for single-file transport.
It is demonstrated that a reasonably general model for single-file passage of solvent through an ultra-narrow pore implies the equality of tracer diffusion and osmotic flow. This result is not trival, but follows from the exactly compensating effects of solvent-solvent interaction on the paritioning of bulk solvent into the pore and on the diffusion rate within the pore. A previous calculation of Longuet-Higgins and Austin is seen to be valid only in the absence of interactions among solvent molecules in the pore.
D001692:Biological Transport; D004058:Diffusion; D007553:Isotope Labeling; D007700:Kinetics; D008433:Mathematics; D008566:Membranes / Q000378:metabolism; D008722:Methods; D008954:Models, Biological; D009995:Osmosis; D012997:Solvents; D013816:Thermodynamics
D012997:Solvents