Challenges in Nanofluidics—Beyond Navier–Stokes at the Molecular Scale

Daivis, Peter J.; Todd, B. D.

doi:10.3390/pr6090144

Cited by 18 publications

(9 citation statements)

References 49 publications

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“…A major roadblock in conducting a scientific investigation in the nanofluidic regime is that existing continuum models fail to elucidate the experimental observations. As nanochannels comprise fewer molecules, there can be excessive molecular fluctuations and the fluid properties can become inhomogeneous [17]. This is especially true when the length scale of the confinement is of the same order of magnitude as the molecular size.…”

Section: Introductionmentioning

confidence: 99%

Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges

Sam

Hartkamp

Kannam

et al. 2020

Molecular Simulation

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The intriguing mass transport properties of carbon nanotubes (CNTs) have received widespread attention, especially the rapid transport of water through CNTs due to their atomically smooth wall interiors. Extensive research has been dedicated to the comprehension of various aspects of water flow in contact with CNTs, the most prominent ones being the studies on slip and flow rates. Experimental and computational studies have confirmed an enhanced water flow rate through this graphitic nanoconfinement. However, a quantitative agreement has not yet been attained. These disparities coupled with incomplete knowledge of the mechanisms of water transport at nanoscale regimes are hindering the possibilities to integrate CNTs in numerous nanofluidic applications. In the present review, we focus on the slip and flow rates of water through CNTs and the factors influencing them. We discuss the key sources of discrepancies in water flow rate and suggest directions for future study.

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Section: Introductionmentioning

confidence: 99%

Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges

Sam

Hartkamp

Kannam

et al. 2020

Molecular Simulation

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“…However, compared with experimental methods, numerical simulations, such as the lattice Boltzmann method and molecular dynamics (MD) simulation, are more attractive in many aspects. First, numerical simulations can readily reach the system sizes and timescales of practical nanoflows [43]. Additionally, numerical methods can provide a controllable way to change a certain property of liquid or solid walls while other properties remain unchanged [44].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, numerical methods can provide a controllable way to change a certain property of liquid or solid walls while other properties remain unchanged [44]. In comparison with physical experiments, numerical simulations allow researchers to study the density, velocity profiles, and other properties with a high resolution [43]. Finally, when the flow systems are under extreme conditions, such as at high shear rates, it has also been proven that numerical simulations are more efficient than experimental methods [45].…”

Section: Introductionmentioning

confidence: 99%

A review on slip boundary conditions at the nanoscale: recent development and applications

Rui-fei¹,

Chai²,

Luo³

et al. 2021

Beilstein J. Nanotechnol.

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The slip boundary condition for nanoflows is a key component of nanohydrodynamics theory, and can play a significant role in the design and fabrication of nanofluidic devices. In this review, focused on the slip boundary conditions for nanoconfined liquid flows, we firstly summarize some basic concepts about slip length including its definition and categories. Then, the effects of different interfacial properties on slip length are analyzed. On strong hydrophilic surfaces, a negative slip length exists and varies with the external driving force. In addition, depending on whether there is a true slip length, the amplitude of surface roughness has different influences on the effective slip length. The composition of surface textures, including isotropic and anisotropic textures, can also affect the effective slip length. Finally, potential applications of nanofluidics with a tunable slip length are discussed and future directions related to slip boundary conditions for nanoscale flow systems are addressed.

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“…The resulting composition is now a material with improved effective properties such as conductivity and density [2][3][4][5][6][7][8][9][10]. Due to their adjustable physical and thermophysical properties, nanofluids are used in wide range of applications [11][12][13][14][15][16][17]. The pertinency of these newly developed fluids in outspread industrial implications lure scientists to study nanofluids.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of MHD Nanofluid Flow Possessing Micro-Rotational Inertia over a Curved Surface with Variable Thermophysical Properties

et al. 2019

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This work presents a numerical investigation of viscous nanofluid flow over a curved stretching surface. Single-walled carbon nanotubes were taken as a solid constituent of the nanofluids. Dynamic viscosity was assumed to be an inverse function of fluid temperature. The problem is modeled with the help of a generalized theory of Eringen Micropolar fluid in a curvilinear coordinates system. The governing systems of non-linear partial differential equations consist of mass flux equation, linear momentum equations, angular momentum equation, and energy equation. The transformed ordinary differential equations for linear and angular momentum along with energy were solved numerically with the help of the Keller box method. Numerical and graphical results were obtained to analyze the flow characteristic. It is perceived that by keeping the dynamic viscosity temperature dependent, the velocity of the fluid away from the surface rose in magnitude with the values of the magnetic parameter, while the couple stress coefficient decreased with rising values of the magnetic parameter.

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Challenges in Nanofluidics—Beyond Navier–Stokes at the Molecular Scale

Cited by 18 publications

References 49 publications

Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges

Fast transport of water in carbon nanotubes: a review of current accomplishments and challenges

A review on slip boundary conditions at the nanoscale: recent development and applications

Computational Study of MHD Nanofluid Flow Possessing Micro-Rotational Inertia over a Curved Surface with Variable Thermophysical Properties

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