Importance of nanochannels shape on blue energy generation in soft nanochannels

Dartoomi, Hossein; Khatibi, Mahdi; Ashrafizadeh, Seyed Nezameddin

doi:10.1016/j.electacta.2022.141175

Cited by 48 publications

(27 citation statements)

References 61 publications

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“…Figure a demonstrates that the osmotic current in all three types of nanochannels rises with an increase in the concentration ratio. Since the number of ionic species grows as the concentration ratio rises, more current flows through the nanochannel as a consequence . Conversely, in type (III) nanochannels, where the concentration ratio rises from 100 to 1000, the value of the osmotic ionic current rises from 293 to 1448 pA , having the same sign of the charge density of the soft layer, and the charge density of the hard surface causes better passage of ions through the channel and thus increases the osmotic ionic current.…”

Section: Resultsmentioning

confidence: 99%

“…The use of fossil fuels has caused catastrophic climate change and irreversible environmental destruction. − There is a growing awareness of the necessity to develop alternative methods of energy generation in today’s world. However, alternatives should not only be easily accessible and affordably priced but also have zero impact on the environment. − Solar, wind, and water power as well as more portable options such as osmotic energy generation are just some of the alternative energy sources that have garnered the interest of scientists in recent years. − In addition, the growth of knowledge in the study of micronano structures has led to the development of more efficient techniques to create energy, the most significant of which is the creation of energy via water salinity variations using nanofluidic membranes. − …”

Section: Introductionmentioning

confidence: 99%

“…52 Although sedimentation and nanochannel obstruction are potential shortcomings with this approach, fresh research has been performed to address these concerns. 53,54 Recently, Dartoomi et al 15 looked into the impacts of nanochannel shape as well as the bipolar soft layer. They showed that nanochannels with a trumpet shape perform better than those with other geometries, with the efficiency reaching roughly 45% under ideal conditions (charge density of the soft layer, N PEL /N A = 100 mol/m 3 , concentration ratio, C H /C L = 100).…”

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Layer-by-Layer Nanofluidic Membranes for Promoting Blue Energy Conversion

Khatibi,

Dartoomi,

Ashrafizadeh

2023

Langmuir

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Layer-by-Layer Nanofluidic Membranes for Promoting Blue Energy Conversion

Khatibi,

Dartoomi,

Ashrafizadeh

2023

Langmuir

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“…The ongoing interest of the research community is not limited to the consideration of symmetric geometries only. In fact, there have been several studies considering microfluidic conduits of various geometries, owing to its critical role in improving the energy efficiency of the concerned system [7–10]. Asymmetric (like bullet, cigarette, hill, hourglass, and trumpet) as well as symmetric (cylindrical) configurations have been considered in the literature, in order to find which geometry provides maximum performance, in terms of various indicators like osmotic current, electrical conductivity, power capacity, energy conversion efficiency, and so on.…”

Section: Introductionmentioning

confidence: 99%

Combined electroosmotic and pressure‐driven transport of neutral solutes across a rough, porous‐walled microtube

et al. 2023

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A number of microfluidic systems of interest essentially consist of micro‐scaled channels/tubes, whose walls are inherently rough. The novelty of the current study lies in exploring the impact of the wall roughness on mass transfer in the case of flow through a microtube with porous wall. The current investigation is possibly the first attempt at exploring the effect of mass transfer for a porous‐walled, rough microtube, as earlier studies were limited to the analysis of hydrodynamic and thermal effects only in an impervious microtube. In particular, the effects of the corrugation amplitude and the wavenumber on the mass transport have been assessed in detail in this work, via a combination of perturbation approximations and numerical analysis. Several interesting revelations are elicited regarding the effects of these pertinent parameters on the mass transfer coefficient, permeation flux, wall surface concentration, and delivery flux of the neutral solute. It has been unveiled that it is possible to enhance the solute mass flux by 10% via appropriate tuning of corrugation amplitude. The findings of the study can help in better understanding of mass transport for a porous‐walled, rough microtube, which has critical relevance in several important applications such as micromixers, targeted drug delivery, and so on.

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“…36 Ashrafizadeh et al solved the Stokes-Brinkman and the Poisson-Nernst_Planck equations simultaneously to explore the effect of nanochannel shape on the ion transfer behavior. 37,38 Xu et al 31 extended the pore-scale microcontinuum model to non-isothermal reactive flow through a multiscale porous medium. They demonstrated the model improvement in terms of mass and energy conservation compared with the previous lattice Boltzmann methods.…”

mentioning

confidence: 99%

Improved micro-continuum approach for capillary-dominated multiphase flow with reduced spurious velocity

Liu

Yang

et al. 2022

Physics of Fluids

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A diverse range of multiphase flow and transport occurs in multiscale porous media. The multiphase micro-continuum Darcy-Brinkmann-Stokes (DBS) model has been developed to simulate the multiphase flow at both the pore and continuum scales via single-field equations. However, the unacceptable spurious velocities produced by the conventional micro-continuum DBS model present challenges to the modeling of capillary-dominated flow dynamics. This study improves the micro-continuum DBS model to mitigate these spurious velocities at the gas-liquid interface and contact-line regions. A hybrid interpolation scheme is proposed to improve the computational accuracy of the interface curvature and reduce the spurious velocity around the gas-liquid interface by 1-2 orders of magnitude. At the porous boundary, the normal to the gas-liquid interface is corrected, and the normal to the solid-fluid interface is smoothed to guarantee the prescribed wettability condition and decrease the spurious velocities at the contact-line region by an order of magnitude. A series of static and dynamic benchmark cases are investigated to demonstrate that the improved DBS model can simulate capillary-dominated multiphase flows with negligible spurious velocities at capillary numbers as low as 10-4 in both simple and complex geometries. The improved DBS model can combine X-ray computed micro-tomography images to perform multiscale simulations of capillary-dominated multiphase flow and understand the effect of sub-resolution porosity on fluid dynamics in naturally multiscale rocks.

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Importance of nanochannels shape on blue energy generation in soft nanochannels

Cited by 48 publications

References 61 publications

Layer-by-Layer Nanofluidic Membranes for Promoting Blue Energy Conversion

Layer-by-Layer Nanofluidic Membranes for Promoting Blue Energy Conversion

Combined electroosmotic and pressure‐driven transport of neutral solutes across a rough, porous‐walled microtube

Improved micro-continuum approach for capillary-dominated multiphase flow with reduced spurious velocity

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