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Solute dispersion in oscillating electro-osmotic flow with boundary mass exchange
| Content Provider | Semantic Scholar |
|---|---|
| Author | Ramon, Guy Z. Agnon, Yehuda Dosoretz, Carlos G. |
| Copyright Year | 2011 |
| Abstract | Mass transfer in an oscillatory electro-osmotic flow (EOF) is theoretically studied, for the case of a cylindrical tube with a reactive wall. An expression for the dispersion coefficient, reflecting the time-averaged mass flux of an electrically neutral solute, is derived analytically. Under the influence of a reversible solute-wall mass exchange, the dispersion coefficient exhibits a complex dependence on the various parameters representing the effects of the electric double-layer thickness, oscillation frequency, solution transport properties, solute partitioning, and reaction kinetics. Our results suggest that, in the presence of a reversible mass exchange at the wall, an oscillatory EOF may be used for separation of species. It is found that optimal conditions for separation are achieved for a thin double-layer, where an inert solute, or one with slow exchange kinetics, experiences virtually no dispersion while the dispersion is maximized for the reactive solute exhibiting fast kinetics. |
| Starting Page | 97 |
| Ending Page | 106 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1007/s10404-010-0650-z |
| Volume Number | 10 |
| Alternate Webpage(s) | https://wetlab.net.technion.ac.il/files/2012/12/Ramon_etal-Oscillating_EOF_dispersion-MFNF_2011.pdf |
| Alternate Webpage(s) | https://doi.org/10.1007/s10404-010-0650-z |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
