Flow-resistance analysis of nano-confined fluids inspired from liquid nano-lubrication: A review

Huang, Xianzhu; Wu, Jian; Zhu, Yudan; Zhang, Yumeng; Feng, Xin; Lü, Xiaohua

doi:10.1016/j.cjche.2017.05.005

Cited by 18 publications

(3 citation statements)

References 127 publications

(148 reference statements)

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“…It shows that the methane molecules could have a great slip velocity on the graphene surface, and such slip velocity could be up to 8.9 m/s, 16.3 m/s, and 28.6 m/s when the pore size is 5 nm, 10 nm, and 15 nm, respectively. Actually, in the slit-like graphene nanopore, such obvious surface slip velocity appears not only for CH 4 , but also in the flow of water, alkane, and some other geofluids [45,62,63]. The result also indicates that the pore size has nonnegligible effect on the slip velocity 5 Geofluids when CH 4 is confined in organic graphene nanopore.…”

Section: Resultsmentioning

confidence: 89%

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Zhan

et al. 2021

Geofluids

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The underlying mechanism of shale gas migration behavior is of great importance to understanding the flow behavior and the prediction of shale gas flux. The slippage of the methane molecules on the surface is generally emphasized in nanopores in most predicted methods currently. In this work, we use molecular dynamic (MD) simulations to study the methane flow behavior in organic (graphene) and inorganic (quartz) nanopores with various pore size. It is observed that the slippage is obvious only on the graphene nanopores and disappeared on the quartz surface. Compared with the traditional Navier-Stokes equation combined with the no-slip boundary, the enhancement of the gas flux is nonnegligible in the graphene nanopores and could be neglected in the quartz nanopores. In addition, the flux contribution ratios of the adsorption layer, Knudsen layer, and the bulk gas are analyzed. In quartz nanopores, the contributions of the adsorption layer and the Knudsen layer are slight when the pore size is larger than 10 nm. It is also noted that even if the Knudsen number is the same, the flow mode may be various with the effect of the pore surface type. Our work should give molecular insights into gas migration mechanisms in organic and inorganic nanopores and provide important reference to the prediction of the gas flow in various types of shale nanopores.

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Section: Resultsmentioning

confidence: 89%

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Zhan

et al. 2021

Geofluids

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“…Similarly, the spatial constraint strategy is also widely adopted by artificial systems. Despite the developed liquid mediums being diverse, such as oil [161], ionic liquid [162][163][164][165][166], or solid melting [142,[167][168][169][170][171][172][173][174], the artificial liquid mediums [158,159,[175][176][177] are developing to reach an equivalent performance to the biological system. Except for the above-mentioned friend-side effects of these liquid-mediated strategies, liquid-mediated interfacial friction strategies may also lead to some Fig.…”

Section: Liquid-mediated Interfacesmentioning

confidence: 99%

Interfacial friction at action: Interactions, regulation, and applications

Wang

et al. 2023

Friction

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Friction is a fundamental force that impacts almost all interface-related applications. Over the past decade, there is a revival in our basic understanding and practical applications of the friction. In this review, we discuss the recent progress on solid-liquid interfacial friction from the perspective of interfaces. We first discuss the fundamentals and theoretical evolution of solid-liquid interfacial friction based on both bulk interactions and molecular interactions. Then, we summarize the interfacial friction regulation strategies manifested in both natural surfaces and artificial systems, focusing on how liquid, solid, gas, and hydrodynamic coupling actions mediate interfacial friction. Next, we discuss some practical applications that are inhibited or reinforced by interfacial friction. At last, we present the challenges to further understand and regulate interfacial friction.

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“…The concentration of Cr(VI) decreased rapidly within the first hour of the experiment, and then rebounded slightly before it stabilized. It is because heavy metals reduction by nanoscale iron particles usually comprises two processes of surface adsorption and chemical reduction (Zhang et al 2012). Cr(VI) was adsorbed quickly onto the surface of GT-NZVI particles in the first phase, and then the adsorbed Cr(VI) was continuously reduced to Cr(III) in the second phase.…”

Section: Removal Efficiency Of Cr(vi) By Gt-nzvi In Watermentioning

confidence: 99%

Assessing the effectiveness of nanoscale zero-valent iron particles produced by green tea for Cr(VI)-contaminated groundwater remediation

Li¹,

Han²,

Deng³

et al. 2023

Journal of Groundwater Science and Engineering

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Nanoscale zero-valent iron particles (NZVI) produced by using green tea (GT) extract as a reductant can remove Cr(VI) from water effectively, which can be utilized in groundwater remediation. In order to define the reaction mechanism and removal effect in the aquifer, in this study, GT-NZVI particles were prepared and measured by some characterization methods to define their surface performance, and then batch and one-dimensional experiments were carried out to reveal the reaction properties of GT-NZVI and Cr(VI) in groundwater. The results showed that the prepared GT-NZVI particles were regular spherical with a diameter of 10-20 nm, which could disperse in water stably. The main component of GT-NZVI was α-Fe with superficial polyphenols as a stabilizer. GT-NZVI suspension had good ability to reduce the Cr(VI) to Cr(III) in water. When the concentration of GT-NZVI was 1 g/L, the removal efficiency of Cr(VI) with an initial concentration of 100 mg/L reached 92.8% in 1 h reaction. In column tests, GT-NZVI passed through the natural sand column successfully with an average outflow percentage of 71.2%. The simulated in-situ reaction zone (IRZ) with GT-NZVI was used to remediate Cr(VI) contaminated groundwater. The outflow concentration of Cr(VI) kept in 0.14-0.32 mg/L corresponding to the outflow rate below 0.32% within 15 days, and the removal efficiency of Cr(VI) by IRZ with GT-NZVI decreased with the increase of aquifer medium particle size, groundwater flow rate and ionic strength. Most of Cr(III) as reduzate was adsorbed or immobilized on the surface or in the lattice of GT-NZVI, which indicated effective immobilization for chromium.

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Flow-resistance analysis of nano-confined fluids inspired from liquid nano-lubrication: A review

Cited by 18 publications

References 127 publications

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Effect of Surface Type on the Flow Characteristics in Shale Nanopores

Interfacial friction at action: Interactions, regulation, and applications

Assessing the effectiveness of nanoscale zero-valent iron particles produced by green tea for Cr(VI)-contaminated groundwater remediation

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