Pressure control model for transport of liquid mercury in carbon nanotubes

Zhang, H. W.; Zhang, Z. Q.; Wang, L.; Zheng, Yonggang; Wang, J.B.; Wang, Z. K.

doi:10.1063/1.2720744

Cited by 11 publications

(4 citation statements)

References 21 publications

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“…Each pressure data point can be obtained by calculating the direct stress within each fluid subvolume. 26 The region between the two dashed lines ranging from 10 to 40 nm is selected to calculate the pressure gradient by performing a linear regression analysis. It is observed that the pressure of fluid decreases almost linearly along the fluid flow ͑x͒ direction, implying that a constant pressure gradient can be easily obtained by the channel moving pressure-driven model.…”

Section: ͑4͒mentioning

confidence: 99%

Pressure-driven flow in parallel-plate nanochannels

Zhang

2009

Applied Physics Letters

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A “channel moving” pressure-driven model is proposed to generate a constant pressure gradient in fluid flow. Classical molecular dynamics simulations are carried out to explore the pressure-driven flow in parallel-plate nanochannels with the channel width ranging from 2.611 to 5.595 nm. Considering the slip boundary conditions, relationships among the pressure gradient, mean flow velocity, and the channel width are investigated to couple the atomistic regime to continuum. The results indicate that the pressure-driven flows confined in nanochannels modeled in our simulations can be approximately described by the Navier–Stokes equations while the approximate accuracy increases with enlarging the channel width.

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Section: ͑4͒mentioning

confidence: 99%

Pressure-driven flow in parallel-plate nanochannels

Zhang

2009

Applied Physics Letters

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“…2. A similar ejector model is adopted by Zhang et al (2007). Periodic boundary conditions along the x and y directions are applied on the simulation box.…”

Section: Simulation Modelmentioning

confidence: 99%

Studying on water nanojet ejection and the wetting phenomena on the nozzle surface

Lin

2012

Microfluid Nanofluid

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In this research, molecular dynamics simulations of water nanojet ejection out of nozzle holes with various sizes under various pressing forces are performed. The water molecules are ejected out the nozzle by a back plate on which a constant force is applied. The results of MD simulations of water ejection show that after one ejection, about 1.3-2.5% of total molecules accumulate on the nozzle plate surface. These molecules affect the ejection of water jet thereafter. The cause of the accumulation of wetting water is investigated by analyzing the trajectories of these molecules. It is found that in the firing chamber near the nozzle plate wall, the arrangement of water molecules is aligned by the surface topology of the metal wall. Water molecules are packed into filamentous structure and these lines stack up at equal distances to each other. Water molecules drift along these lines, the trajectories of these molecules are sinuous, the velocity directions of them are random; molecules drift along the parallel lines until they reach a region of low pressure beneath the nozzle opening. These molecules eject out through the edge of the nozzle, they fall back on to the nozzle surface and eventually deposit on the nozzle surface due to low ejection velocity.

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“…Interaction of fluids with microscopic pores by filling (imbibition) of nanotubes with oil or mercury is of great technological interest [22,23,24]. For example, inorganic nanotubes were successfully integrated with a microfluidic system to create a first nanofluidic device capable of sensing a single DNA molecule [24].…”

Section: Computer Simulation Of Fluid Flow In Nanotubesmentioning

confidence: 99%

“…Molecular dynamics and Monte Carlo methods were applied for studying microfluids [14,17,[20][21][22][23][24][25]. Propagation of acoustic waves on metal cylinders and through the carbon nanotubes was discussed in [37][38][39][40][41][42].…”

Section: Computer Simulation Of Fluid Flow In Nanotubesmentioning

confidence: 99%

Activation of Nanoflows for Fuel Cells

Insepov

Miller²

2012

Journal of Nanotechnology in Engineering and Medicine

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Propagation of Rayleigh traveling waves from a gas on a nanotube surface activates a macroscopic flow of the gas (or gases) that depends critically on the atomic mass of the gas. Our molecular dynamics simulations show that the surface waves are capable of actuating significant macroscopic flows of atomic and molecular hydrogen, helium, and a mixture of both gases both inside and outside carbon nanotubes (CNT). In addition, our simulations predict a new “nanoseparation” effect when a nanotube is filled with a mixture of two gases with different masses or placed inside a volume filled with a mixture of several gases with different masses. The mass selectivity of the nanopumping can be used to develop a highly selective filter for various gases. Gas flow rates, pumping, and separation efficiencies were calculated at various wave frequencies and phase velocities of the surface waves. The nanopumping effect was analyzed for its applicability to actuate nanofluids into fuel cells through carbon nanotubes.

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Pressure control model for transport of liquid mercury in carbon nanotubes

Cited by 11 publications

References 21 publications

Pressure-driven flow in parallel-plate nanochannels

Pressure-driven flow in parallel-plate nanochannels

Studying on water nanojet ejection and the wetting phenomena on the nozzle surface

Activation of Nanoflows for Fuel Cells

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