Molecular dynamics simulation of nanofluid’s flow behaviors in the near-wall model and main flow model

Hu, Chengzhi; Bai, Ming; Lv, Jizu; Wang, Peng; Zhang, Liang; Li, Xiaojie

doi:10.1007/s10404-013-1323-5

Cited by 28 publications

(21 citation statements)

References 32 publications

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“…The number density near the wall surfaces is much higher than elsewhere, which indicates that adsorption layers are formed near the walls. This phenomenon has been demonstrated by Hu et al [35], Thompson and Robbins [40], and Jeng et al [41]. The adsorption layers do not break away from the walls, which is illustrated in the schematics of Fig.…”

Section: Mechanisms Of Cu Nanoparticle In Improving Load-carrying Capmentioning

confidence: 54%

“…Many studies have proven that an adsorption layer exists around the nanoparticle [35,[37][38][39]. However, researchers have only studied the impact of adsorption layer on nanofluid thermal conductivity.…”

Section: Mechanisms Of Cu Nanoparticle In Improving Load-carrying Capmentioning

confidence: 99%

“…The calculation method for number density is from Ref. [35]. The density near the nanoparticle is much higher than that far away from the nanoparticle surface.…”

Section: Mechanisms Of Cu Nanoparticle In Improving Load-carrying Capmentioning

confidence: 99%

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Molecular dynamics simulation of mechanism of nanoparticle in improving load-carrying capacity of lubricant film

Bai

et al. 2015

Computational Materials Science

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Section: Mechanisms Of Cu Nanoparticle In Improving Load-carrying Capmentioning

confidence: 54%

Section: Mechanisms Of Cu Nanoparticle In Improving Load-carrying Capmentioning

confidence: 99%

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Molecular dynamics simulation of mechanism of nanoparticle in improving load-carrying capacity of lubricant film

Bai

et al. 2015

Computational Materials Science

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“…6, where the density peaks at the boundaries for the volume fraction of 13% is lower than that for the volume fraction of 6.5%. The solid like structure of the water molecules also occurs at the water-fullerene interfaces, 7 which causes that there are more water molecules accumulated around the fullerenes with increasing the volume fraction of C 60 , further leading to the decrease of the number density at the graphene-NFs interfaces. It suggests that the amount of the molecules accumulated at the fluid boundaries decreases with increasing the volume fraction of C 60 , resulting in the decrease in the friction between the NFs and graphene sheets and the corresponding increase in the boundary slip velocity.…”

Section: A Fullerene-water Nfs In Couette Modelmentioning

confidence: 99%

“…Certainly, the near-wall model and the central flow model of the fluids in nanochannels obtained by MD studies can be combined to clarify the nanofluidic behaviors accurately with considering the difference between the boundary layers and the central fluids. 7 Nevertheless, some experiments and molecular simulations imply that the continuum assumptions are still applicable for the fluids confined in nanochannels with the lower limit of the channel width in the range of ∼1-4 nm. [8][9][10][11] Recently, a convenient MD pre-simulation approach is proposed to measure CFD-type properties including boundary conditions and constitutive relations.…”

Section: Introductionmentioning

confidence: 99%

Fullerene-water nanofluid confined in graphene nanochannel

Liu

Zhang

2017

AIP Advances

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The flow behaviors and boundary slip of the fullerene-water nanofluids (NFs) confined in graphene nanochannels are first investigated by using classical molecular dynamics simulations. The influences of the shear rate in Couette model, the driving force in Poiseuille model, the volume fraction, and the charge magnitude on the motion behaviors and the boundary slip are explored with considering the dynamics and the accumulation of the fullerene within the NFs. The results show that the boundary slip velocity increases almost linearly with the shear rate below a threshold of the shear rate while it increases sharply above the threshold. The relatively large driving force in Poiseuille model and the large shear rate in Couette model can reduce the accumulation of the fullerenes. The increase in the volume fraction of the fullerene in NFs can enhance the shear viscosity, and interestingly, it can increase the boundary slip velocity of the NFs in graphene channels. As the charge magnitude of the graphene channel increases, the boundary slip of fullerene NFs first increases to a threshold and then decreases slightly. The findings may be helpful to the design and fabrication of the low dimensional carbon materials-based nano-apparatus.

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Molten and solidification properties of copper nanoparticles

Zhang

Zheng

et al. 2016

Surf. Interface Anal.

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The melting and solidifying processes are carried out using molecular dynamics simulations. The influencing mechanism of the simulation size and the crystal configuration after solidification on the molten and the solidification properties is explored. The results demonstrate that the crystal structure of solidified copper nanoparticle is sensitive to the size of the copper nanocubes. Polycrystalline appears in the solidified copper nanoparticle for the relatively larger copper cubes; correspondingly, the grain boundaries give rise to the increase of the average atomic energy. Whereas for the relatively small copper cubes, the solidified copper nanoparticles mainly present monocrystalline structure. Moreover, the relationship between the internal pressure of the liquid copper droplets and the droplet diameter is studied to clarify the surface tension property at nanoscale. It is found that the internal pressure of the liquid copper droplets is logarithmically linearly dependent on the diameter of the copper droplets, implying that the surface tension of the liquid copper is not sensitive to the diameter of the liquid copper droplets. The present findings will be helpful to the preparation of the copper nanoparticle‐based thin ribbon. Copyright © 2016 John Wiley & Sons, Ltd.

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Molecular dynamics simulation of nanofluid’s flow behaviors in the near-wall model and main flow model

Cited by 28 publications

References 32 publications

Molecular dynamics simulation of mechanism of nanoparticle in improving load-carrying capacity of lubricant film

Molecular dynamics simulation of mechanism of nanoparticle in improving load-carrying capacity of lubricant film

Fullerene-water nanofluid confined in graphene nanochannel

Molten and solidification properties of copper nanoparticles

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