Molecular dynamic investigation on the structures and thermal properties of carbon nanotube interfaces

Wang, Jifen; Xie, Huaqing

doi:10.1016/j.applthermaleng.2014.12.064

Cited by 9 publications

(3 citation statements)

References 30 publications

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“…There are many other reported results for different contact modes of CNTs [103][104][105][106]. Thermal contact resistance between CNT and other materials such as h-BN [107], Cu nanowires [108]. Chen et al [109].…”

Section: Thermal Contact Resistance In Zero-to-one Dimensional Structmentioning

confidence: 99%

Energy coupling across low-dimensional contact interfaces at the atomic scale

Yue

Zhang

Xie

et al. 2017

International Journal of Heat and Mass Transfer

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The miniaturization in energy devices and their critical needs for heat dissipation have facilitated research on exceptional thermal properties of novel low-dimensional materials. Current studies demonstrated the main challenge for solving thermal transport issues is the large thermal contact resistance across these low-dimensional material interfaces when they are either bundled together or supported by a substrate. A clear understanding of thermal transport across these atomic interfaces through experimental characterization or numerical simulation is important, but nontrivial. Due to instrumentation limit, only a few thermal characterization methods are applicable. Accordingly, many studies have been conducted by theoretical analysis and molecular dynamics to understand the physical process during this ultra-fast and ultra-small thermal transport. In this review, both experimental work and molecular dynamics studies on atomic-scale thermal contact resistance of low-dimensional materials (from zero-to two-dimensional) are reviewed. Challenges as well as opportunities in the study of thermal transport in atomic-layer structures are outlined. Considering the remarkable complexity of physical/chemical conditions, there is still a large room in understanding fundamentals of energy coupling across these atomic-layer interfaces.

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Section: Thermal Contact Resistance In Zero-to-one Dimensional Structmentioning

confidence: 99%

Energy coupling across low-dimensional contact interfaces at the atomic scale

Yue

Zhang

Xie

et al. 2017

International Journal of Heat and Mass Transfer

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“…Theoretical analysis and experimental research are two general approaches for studying the dynamic characteristics of fluid-conveying CNTs. However, dynamic experimentation at the nanoscale is quite difficult to execute and control [2]; many theoretical and numerical methods have been employed, including molecular dynamics simulations (MD) [4,5], classical elastic constitutive models [6], and smallscale elastic models such as the coupled stress model, nonlocal elastic model and elastic strain gradient model [7][8][9][10][11][12][13][14][15][16]. MD is the most reasonable approach because it calculates the interaction between all of the atoms in the system, but the application of MD is limited to some complex structures, such as fluid-conveying systems.…”

Section: Introductionmentioning

confidence: 99%

Axisymmetric Wave Propagation Behavior in Fluid-Conveying Carbon Nanotubes Based on Nonlocal Fluid Dynamics and Nonlocal Strain Gradient Theory

Yang

Lin

Guo

2020

J. Vib. Eng. Technol.

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Purpose Goal for the present research is investigating the axisymmetric wave propagation behaviors of fluid-filled carbon nanotubes (CNTs) with low slenderness ratios when the nanoscale effects contributed by CNT and fluid flow are considered together. Method An elastic shell model for fluid-conveying CNTs is established based on theory of nonlocal elasticity and nonlocal fluid dynamics. The effects of stress non-locality and strain gradient at nanoscale are simulated by applying nonlocal stress and strain gradient theories to CNTs and nonlocal fluid dynamics to fluid flow inside the CNTs, respectively. The equilibrium equations of axisymmetric wave motion in fluid-conveying CNTs are derived. By solving the governing equations, the relationships between wave frequency and all small-scale parameters, as well as the effects caused by fluid flow on different wave modes, are analyzed. Results The numerical simulation indicates that nonlocal stress effects damp first-mode waves but promote propagation of second-mode waves. The strain gradient effect promotes propagation of first-mode waves but has no influence on second-mode waves. The nonlocal fluid effect only causes damping of second-mode waves and has no influence on first-mode waves. Damping caused by nonlocal effects are most affect on waves with short wavelength, and the effect induced by strain gradient almost promotes the propagation of wave with all wavelengths.

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“…[1][2][3] The research approaches for the dynamic behaviors of fluid-conveying carbon nanotubes (CNTs) include experimental investigation and theoretical analysis. Because implementing an experimental investigation is quite difficult in terms of control and maneuverability at the nanoscale, 2 many computational and theoretical approaches have been developed, including molecular dynamic (MD) simulations, 4,5 classical continuum models, 6 and nanoscale continuum models based on different scale cross theories such as couple stress theory, nonlocal elastic theory, and strain gradient theory. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] However, since the size effects are the key factors on the material properties of CNTs and cannot be ignored directly, the microscale continuum model is an effective method to investigate the scale effects on the material properties of CNTs.…”

Section: Introductionmentioning

confidence: 99%

Study on the small-scale effect on wave propagation characteristics of fluid-filled carbon nanotubes based on nonlocal fluid theory

Yang

Wang

2019

Advances in Mechanical Engineering

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In this article, Timoshenko's beam model is established to investigate the wave propagation behaviors for a fluidconveying carbon nanotube when employing the nonlocal stress-strain gradient coupled theory and nonlocal fluid theory. The governing equations of motion for the carbon nanotube are derived. The small-scale influences induced by the nanotube are simulated by nonlocal and strain gradient effects, and the scale effect induced by fluid flow is first investigated applying nonlocal fluid theory. Numerical results obtained by solving the governing equations indicate that the nonlocal effect induced by the nanotube leads to wave damping and a decrease in stiffness, while the strain gradient effect contributes to wave promotion and an enhancement in stiffness. The scale effect caused by the inner fluid only leads to a decay for a high-mode wave since there is no influence from fluid flow on the low-mode wave. The numerical solution is validated by comparing with Monte Carlo simulation and interval analysis method.

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Molecular dynamic investigation on the structures and thermal properties of carbon nanotube interfaces

Cited by 9 publications

References 30 publications

Energy coupling across low-dimensional contact interfaces at the atomic scale

Energy coupling across low-dimensional contact interfaces at the atomic scale

Axisymmetric Wave Propagation Behavior in Fluid-Conveying Carbon Nanotubes Based on Nonlocal Fluid Dynamics and Nonlocal Strain Gradient Theory

Study on the small-scale effect on wave propagation characteristics of fluid-filled carbon nanotubes based on nonlocal fluid theory

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