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논문 기본 정보

자료유형
학술저널
저자정보
Rajni (O. P. Jindal Global University) Prashant Kumar (National Institute of Technology)
저널정보
장전수학회 Proceedings of the Jangjeon Mathematical Society Proceedings of the Jangjeon Mathematical Society Vol.22 No.1
발행연도
2019.1
수록면
193 - 200 (8page)

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When fluids are confined in a structure at nanoscale, such as in a na-nochannel, the electric double layers (EDLs) from opposite walls may have strong interactions. This phenomena results in EDL overlap, which leads to significant changes in the electric field and the fluid properties. Electroosmotic flow (EOF) describes the motion of electrolyte due to the existence of an EDL. Ions in electrolyte have finite sizes which become comparable to EDL thickness in nanochannels and thus cannot be ne-glected during the formulation. Ion size have been shown to influence the extent of EDL overlapping in channel [S. Das and S. Chakraborty, Physical Review E, vol. 84, p. 012501, 2011]. The electrokinetic effects for a system that are not less than 10nm are examined, where van der Waals forces cease to be significant compared to the electrostatic forces. Thus, it is appropriate to apply continuum equations in modeling. For sys-tems below 10nm the continuum approach is not applicable but the un-derstanding based on continuum modeling are still beneficial as a quanti-tative reference. In this paper, the electroosmotic flow in nanochannels is investigated by using the asymmetric ion size model proposed by [Y. Han, S. Huang, and T. Yan, Journal of Physics: Condensed Matter, vol. 26, p. 284103, 2014]. The effect of size of ions on the flow behavior in na-nochannels is examined. The average electroosmotic mobility is obtained for both the cases of symmetric and asymmetric ion sizes for different nanochannel widths.

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