Abstract
We study how the adsorption of a near-critical binary mixture in a nanopore is modified by flow inside the pore. We identify three types of steady states upon variation of the pore Péclet number (), which can be reversibly accessed by the application of an external pressure. Interestingly, for small the pore acts as a weakly selective membrane which separates the mixture. For intermediate , the flow effectively shifts the adsorption in the pore, thereby opening possibilities for enhanced and tunable solute transport through the pore. For large , the adsorption is progressively reduced inside the pore, accompanied by a long-ranged dispersion of the mixture far from the pore.
- Received 23 August 2016
DOI:https://doi.org/10.1103/PhysRevLett.118.014502
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Focus
Nanochannel Could Separate Mixed Fluids
Published 6 January 2017
Calculations show that capillary forces affecting a fluid mixture flowing through a nanochannel could be used to separate the mixture.
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