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Open AccessArticle

Electroosmotic Flow of Viscoelastic Fluid in a Nanochannel Connecting Two Reservoirs

by Lanju Mei 1 and Shizhi Qian 2,*
1
Department of Engineering and Aviation Sciences, University of Maryland Eastern Shore, Princess Anne, MD 21853, USA
2
Department of Mechanical and Aerospace Engineering, Old Dominion University, Norfolk, VA 23529, USA
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(11), 747; https://doi.org/10.3390/mi10110747
Received: 18 October 2019 / Revised: 29 October 2019 / Accepted: 30 October 2019 / Published: 31 October 2019
(This article belongs to the Special Issue Micro/Nano-Chip Electrokinetics, Volume III)
Electroosmotic flow (EOF) of viscoelastic fluid with Linear Phan-Thien–Tanner (LPTT) constitutive model in a nanochannel connecting two reservoirs is numerically studied. For the first time, the influence of viscoelasticity on the EOF and the ionic conductance in the micro-nanofluidic interconnect system, with consideration of the electrical double layers (EDLs), is investigated. Regardless of the bulk salt concentration, significant enhancement of the flow rate is observed for viscoelastic fluid compared to the Newtonian fluid, due to the shear thinning effect. An increase in the ionic conductance of the nanochannel occurs for the viscoelastic fluid. The enhancement of the ionic conductance is significant under the overlapping EDLs condition. View Full-Text
Keywords: electroosmotic flow; viscoelastic fluid; nanofluidics; ionic conductance; electrical double layer electroosmotic flow; viscoelastic fluid; nanofluidics; ionic conductance; electrical double layer
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Mei, L.; Qian, S. Electroosmotic Flow of Viscoelastic Fluid in a Nanochannel Connecting Two Reservoirs. Micromachines 2019, 10, 747.

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