Analysis of the electroviscous effects on pressure-driven flow in nanochannels using effective ionic concentrations

Kim, Sung Il

doi:10.1007/s10404-017-2029-x

Cited by 21 publications

(7 citation statements)

References 57 publications

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“…There are many studies dedicated to understanding the ionic transport through nanofluidic systems. The majority of these theoretical analyses examined the attenuating effect of conduction current on flow rate by an apparent increase in the viscosity as “electroviscous effect”, − which was found to reduce the ionic transport. Electroviscosity increases with an increased overlap of EDL from opposing surfaces that decrease salt concentration and/or by decrease confinement height reducing the ionic current.…”

Section: Introductionmentioning

confidence: 99%

“…The majority of these theoretical analyses examined the attenuating effect of conduction current on flow rate by an apparent increase in the viscosity as “electroviscous effect”, − which was found to reduce the ionic transport. Electroviscosity increases with an increased overlap of EDL from opposing surfaces that decrease salt concentration and/or by decrease confinement height reducing the ionic current. Researchers employed the Debye–Hückel parameter ( H/λ ) to quantify electroviscosity effects. , Increase in surface zeta potential causes electroviscosity to increase until the zeta potential reaches a threshold above which EDL becomes thin and electroviscosity becomes negligible .…”

Section: Introductionmentioning

confidence: 99%

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Slip Effects on Ionic Current of Viscoelectric Electroviscous Flows through Different Length Nanofluidic Channels

Şen

Barışık

2020

Langmuir

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Bu çalışma, bulanık mantık algoritması oluşturularak, örnek seçilen devlet hastanelerinin hasta bakım ve tedavi alanlarının tasarım verimliliklerine göre sınıflandırılması için yürütülmüştür. Hasta bakım ve tedavi ünitelerinin kat planlarından hasta kullanım alanları ve dolaşım alanları elde edilerek bulanık mantık modeli alt kümeleri için üyelik fonksiyonları oluşturulmuştur. Girdi değişkenleri olarak hasta kullanım alanları ve dolaşım alanları modellenmiştir. Girdi değişkenleri ile çıktı değişkeni olan tasarım verimliliği arasındaki ilişkiler bulanık mantık kuralları ile ortaya çıkarılmıştır. Mevcut olan hasta bakım ünitelerini incelemek için, verimlilik çıktı değerleri modelden elde edilmiştir. Genel tasarım normları, tasarım kriterleri ve önceki çalışmalar ışığında ve de bu model aracılığıyla verimlilik sınıfları oluşturulmuştur. Verimlilik sınıflandırılması hastanelerin karşılaştırılarak incelenmesiyle sonuçlanmıştır.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Slip Effects on Ionic Current of Viscoelectric Electroviscous Flows through Different Length Nanofluidic Channels

Şen

Barışık

2020

Langmuir

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“…The literature suggests that the electric double layer is the most dominant surface interaction for this mechanism, while the zeta potential at both rock/brine and brine/oil interfaces directly affects the volume of trapped oil released from the rock 23 , 24 . Other pertaining issues with literature in electrokinetic flow are the predominant assumptions of steady-state flow during transport and microchannels having infinite lengths 25 – 32 . Such assumptions do not allow the understanding of the effect of charges present at the inlet and exit of the microchannel.…”

Section: Introductionmentioning

confidence: 99%

“…Such assumptions do not allow the understanding of the effect of charges present at the inlet and exit of the microchannel. Moreover, the assumption of an infinite microchannel enables the assumption of only radial change in ion concentration, using the one-dimensional Poisson–Boltzmann equation, and ignores the variation of ion concentration in the axial direction, which can be studied using the extended Nernst–Planck equations 32 – 36 .…”

Section: Introductionmentioning

confidence: 99%

Analysis of streaming potential flow and electroviscous effect in a shear-driven charged slit microchannel

Riad

Khorshidi

Sadrzadeh

2020

Sci Rep

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Investigating the flow behavior in microfluidic systems has become of interest due to the need for precise control of the mass and momentum transport in microfluidic devices. In multilayered-flows, precise control of the flow behavior requires a more thorough understanding as it depends on multiple parameters. The following paper proposes a microfluidic system consisting of an aqueous solution between a moving plate and a stationary wall, where the moving plate mimics a charged oil–water interface. Analytical expressions are derived by solving the nonlinear Poisson–Boltzmann equation along with the simplified Navier–Stokes equation to describe the electrokinetic effects on the shear-driven flow of the aqueous electrolyte solution. The Debye–Huckel approximation is not employed in the derivation extending its compatibility to high interfacial zeta potential. Additionally, a numerical model is developed to predict the streaming potential flow created due to the shear-driven motion of the charged upper wall along with its associated electric double layer effect. The model utilizes the extended Nernst–Planck equations instead of the linearized Poisson–Boltzmann equation to accurately predict the axial variation in ion concentration along the microchannel. Results show that the interfacial zeta potential of the moving interface greatly impacts the velocity profile of the flow and can reverse its overall direction. The numerical results are validated by the analytical expressions, where both models predicted that flow could reverse its overall direction when the interfacial zeta potential of the oil–water is above a certain threshold value. Finally, this paper describes the electroviscous effect as well as the transient development of electrokinetic effects within the microchannel.

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“…have investigated electroviscous influences in the periodical flow of power-law liquid in a rectangular microfluidic device Hsu et al (2016). have numerical explored the electrokinetics in the silica channels using three EDL models like Gouy-Chapman (GC), Basic stern (BS), and Viscoelectric (VE) models Kim and Kim (2018). have studied the flow through nanochannels using effective ion concentration and quantified the electro-viscosity effects in terms of a newly introduced parameter (ratio of ζ potential to D-H parameter) Jing et al (2018).…”

mentioning

confidence: 99%

Charge-dependent slip flow of ionic liquids through the non-uniform microfluidic device: pressure drop and electroviscous effects

Dhakar,

Bharti

2022

Preprint

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This work investigates the electroviscous effects in the presence of the charge-dependent slip in the steady pressure-driven laminar flow of the symmetric (1:1) electrolytes liquid through a uniformly charged rectangular contraction -expansion (4:1:4) microfluidic device. The mathematical model comprising the Poison, the Nernst-Plank, the Navier-Stokes, and the current continuity equations are solved numerically using the finite element method (FEM). The flow fields (electrical potential, charge, induced electric field strength, pressure drop, and electroviscous correction factor) have been obtained and presented for the wide range of the governing parameters like inverse Debye length (2 ≤ K ≤ 20), surface charge density (4 ≤ S ≤ 16) and the slip length (0 ≤ B 0 ≤ 0.20) at fixed Schmidt number (Sc = 1000) and low Reynolds number (Re = 0.01). The flow fields have shown complex dependence on the governing parameters. The charge-dependent slip has further enhanced the complexity of the dependency in comparison to the no-slip condition. In the presence of charge-dependent slip, the total electrical potential and pressure drop changes maximally by 78% and 63%, respectively, over the ranges of conditions. The electroviscous correction factor (Y) increases by 22% under the no-slip (B 0 = 0) condition. In contrast, the electroviscous correction factor (Y) increases by 19 -72% for charge-dependent slip than that in the no-slip flow for the considered ranges of the conditions. A simple analytical model to estimate the pressure drop in the electroviscous flow, developed based on the Poiseuille flow in the individual uniform sections and pressure loss due to orifice, overpredicts the pressure drop by 2-4%. Finally, the predictive relations, depicting the functional dependence of the numerical results on the governing parameters, are presented for their practical use in the design and engineering of microfluidic devices.

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Analysis of the electroviscous effects on pressure-driven flow in nanochannels using effective ionic concentrations

Cited by 21 publications

References 57 publications

Slip Effects on Ionic Current of Viscoelectric Electroviscous Flows through Different Length Nanofluidic Channels

Slip Effects on Ionic Current of Viscoelectric Electroviscous Flows through Different Length Nanofluidic Channels

Analysis of streaming potential flow and electroviscous effect in a shear-driven charged slit microchannel

Charge-dependent slip flow of ionic liquids through the non-uniform microfluidic device: pressure drop and electroviscous effects

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