Effects of overlapping electric double layer on mass transport of a macro‐solute across porous wall of a micro/nanochannel for power law fluid

Bhattacharjee, S.; Mondal, Mrinmoy; De, Sirshendu

doi:10.1002/elps.201600376

Cited by 8 publications

(5 citation statements)

References 29 publications

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“…In the above context, the liquid slip occurs over the hydrophobic surface [201] for the significant zeta potential in electrolyte solutions. By combining electrokinetic and pressuredriven with the first-order Navier's slip condition, the oscillating flow in rectangular [202][203][204][205][206][207] and circular [208][209][210] microchannels increased the flow efficiency. It was found that 10% slip length in a specific electrolyte solution enhances the flow rate by 20%.…”

Section: Slip/jump On Electrokinetic Flowmentioning

confidence: 99%

Review and Analysis of Electro-Magnetohydrodynamic Flow and Heat Transport in Microchannels

Kundu

Saha

2022

Energies

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This paper aims to develop a review of the electrokinetic flow in microchannels. Thermal characteristics of electrokinetic phenomena in microchannels based on the Poisson–Boltzmann equation are presented rigorously by considering the Debye–Hückel approximation at a low zeta potential. Several researchers developed new mathematical models for high electrical potential with the electrical double layer (EDL). A literature survey was conducted to determine the velocity, temperature, Nusselt number, and volumetric flow rate by several analytical, numerical, and combinations along with different parameters. The momentum and energy equations govern these parameters with the influences of electric, magnetic, or both fields at various preconditions. The primary focus of this study is to summarize the literature rigorously on outcomes of electrokinetically driven flow in microchannels from the beginning to the present. The possible future scope of work highlights developing new mathematical analyses. This study also discusses the heat transport behavior of the electroosmotically driven flow in microchannels in view of no-slip, first-order slip, and second-order slip at the boundaries for the velocity distribution and no-jump, first-order thermal-slip, and second-order thermal-slip for the thermal response under maintaining a uniform wall-heat flux. Appropriate conditions are conferred elaborately to determine the velocity, temperature, and heat transport in the microchannel flow with the imposition of the pressure, electric, and magnetic forces. The effects of heat transfer on viscous dissipation, Joule heating, and thermal radiation envisage an advanced study for the fluid flow in microchannels. Finally, analytical steps highlighting different design aspects would help better understand the microchannel flow’s essential fundamentals in a single document. They enhance the knowledge of forthcoming developmental issues to promote the needed study area.

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Section: Slip/jump On Electrokinetic Flowmentioning

confidence: 99%

Review and Analysis of Electro-Magnetohydrodynamic Flow and Heat Transport in Microchannels

Kundu

Saha

2022

Energies

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“…The gating voltage not only alters the transverse electric field distribution in the nanochannel due to the double layer effect [40] but also impacts the lateral electric field and thus the electrophoretic force. Consequently, varying the gating voltage magnitude would have an impact on the molecular flux and transfer efficiency.…”

Section: Impact Of Gating Voltage Magnitude On the Transfer Efficiencymentioning

confidence: 99%

Nanofluidic charged-coupled devices for controlled DNA transport and separation

Nouri

Guan

2021

Nanotechnology

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Controlled molecular transport and separation is of significant importance in various applications. In this work, we presented a novel concept of nanofluidic molecular charge-coupled device (CCD) for controlled DNA transport and separation. By leveraging the unique field-effect coupling in nanofluidic systems, the nanofluidic molecular CCD aims to store charged biomolecules such as DNAs in discrete regions in nanochannels and transfer and separate these biomolecules as a charge packet in a bucket brigade fashion. We developed a quantitative model to capture the impact of nanochannel surface charge, gating voltage and frequency, molecule diffusivity, and gating electrode geometry on the transport and separation efficiency. We studied the synergistic effects of these factors to guide the device design and optimize the DNA transport and separation in a nanofluidic CCD. The findings in this study provided insight into the rational design and implementation of the nanofluidic molecular CCD.

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“…Since the advent of nanoscience in the 1980s, it has received a lot of attention from governments and scholars, whose purpose is to determine the flow behavior of confined fluids in the nanochannels such as nanotubes and nanopores to assist production activities. The most important feature of fluids in nanochannels is that the strong wall effects make the fluid properties at the interface different from that in the bulk phase. − Many novel phenomena during the water and ion transport processes have been discovered, such as overlapping electric double-layer structures, and wall slip . Michaelides and Morgenstern identified and explained a competition between the ability of water molecules to simultaneously bond to the substrate and to accept hydrogen bonds through a combination of low-temperature scanning tunneling microscopy (STM) experiments and first-principles electronic structure calculations .…”

Section: Introductionmentioning

confidence: 99%

Interfacial Diffusion of Hydrated Ion on Graphene Surface: A Molecular Simulation Study

Zhu

Yan

et al. 2020

Langmuir

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Hydration plays an important role in the diffusion and sieving of ions within nanochannels. However, it is hard to quantitatively analyze the contribution of hydration to the diffusion rates due to the complex hydrogen-bond and charge interactions between atoms. Here, we quantitatively investigated the interfacial diffusion rates of a single hydrated ion with different number of water molecules on graphene surface through molecular dynamics simulation. The simulation results show the ballistic diffusion mode by analyzing the mean-square displacement, and the diffusion rates change nonmonotonically with the hydration number. The potential energy profiles with the changing position of the hydrated ion on graphene surface were further analyzed, which shows the dominant factor for interfacial diffusion changing from ion−graphene interaction to water−graphene interaction as the number of water molecules increases. Besides, it was found that the surface hydrophilicity weakened the influence of hydration number on the diffusion rates of hydrated ion. Finally, the diffusion properties of different hydrated ions on graphene surface were investigated, and the hydrated Li + , Na + , and K + containing three, four, and five water molecules, respectively, show the fastest diffusion rate. This work demonstrates the interfacial diffusion behavior and mechanism of hydrated ions at the molecular level, which can provide valuable guidance in nanosensors, seawater desalination, and other hydrated ion-related fields.

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Effects of overlapping electric double layer on mass transport of a macro‐solute across porous wall of a micro/nanochannel for power law fluid

Cited by 8 publications

References 29 publications

Review and Analysis of Electro-Magnetohydrodynamic Flow and Heat Transport in Microchannels

Review and Analysis of Electro-Magnetohydrodynamic Flow and Heat Transport in Microchannels

Nanofluidic charged-coupled devices for controlled DNA transport and separation

Interfacial Diffusion of Hydrated Ion on Graphene Surface: A Molecular Simulation Study

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