Model for thermal conductivity of carbon nanotube-based composites

Xue, Qingzhong

doi:10.1016/j.physb.2005.07.024

Cited by 591 publications

(287 citation statements)

References 16 publications

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“…Choi et al (2001) shows that for cylindrical shape particles the HC model (n = 6) significantly underestimated the experimental data by showing a very minor increase of about 10 % for 1.0 vol% nanotubes in oil in comparison to the 160 % experimental enhancement in the thermal conductivity. Xue (2005) noticed that the existing models are only valid for spherical or rotational elliptical particles with small axial ratio. Furthermore, these models do not account for the effect of the space distribution of the CNTs on thermal conductivity.…”

Section: Theoretical Models For Effective Thermal Conductivitymentioning

confidence: 99%

Fluid flow and heat transfer of carbon nanotubes along a flat plate with Navier slip boundary

2013

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Homogeneous flow model is used to study the flow and heat transfer of carbon nanotubes (CNTs) along a flat plate subjected to Navier slip and uniform heat flux boundary conditions. This is the first paper on the flow and heat transfer of CNTs along a flat plate. Two types of CNTs, namely, single-and multi-wall CNTs are used with water, kerosene or engine oil as base fluids. The empirical correlations are used for the thermophysical properties of CNTs in terms of the solid volume fraction of CNTs. For the effective thermal conductivity of CNTs, Xue (Phys B Condens Matter 368:302-307, 2005) model has been used and the results are compared with the existing theoretical models. The governing partial differential equations and boundary conditions are converted into a set of nonlinear ordinary differential equations using suitable similarity transformations. These equations are solved numerically using a very efficient finite difference method with shooting scheme. The effects of the governing parameters on the dimensionless velocity, temperature, skin friction, and Nusselt numbers are investigated and presented in graphical and tabular forms. The numerical results of skin friction and Nusselt numbers are compared with the available data for special cases and are found in good agreement.

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Section: Theoretical Models For Effective Thermal Conductivitymentioning

confidence: 99%

Fluid flow and heat transfer of carbon nanotubes along a flat plate with Navier slip boundary

2013

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“…In particular, owing to their extraordinary thermal conductivity and mechanical and electrical properties, carbon nanotubes find applications as additives to various structural materials. For instance, nanotubes form a tiny portion of the material(s) in some (primarily carbon fiber) baseball bats, golf clubs, or car parts [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation Analysis for a CNT Suspension Nanofluid in Plumb Ducts with Peristalsis

Akbar

2015

Entropy

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Abstract:The purpose of the current investigation was to discuss the entropy generation analysis for a carbon nanotube (CNT) suspension nanofluid in a plumb duct with peristalsis. The entropy generation number due to heat transfer and fluid friction is formulated. The velocity and temperature distributions across the tube are presented along with pressure attributes. Exact analytical solution for velocity and temperature profile are obtained. It is found that the entropy generation number attains high values in the region close to the walls of the tube, while it attains low values near the center of the tube.

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“…Table Discussion Table 1 illustrates various physical properties of certain base liquids (water, kerosene oil and engine oil) and nanoparticles such as SWCNTs and MWCNTs. Xue [44] calculated dissimilar values of effective thermal conductivities of CNT nanofluids for several values of the volume fraction φ of the CNTs shown in Table 2. It can be seen in Table 2 that the thermal conductivity is improved with inspiring volume fraction φ of CNTs.…”

Section: Resultsmentioning

confidence: 99%

“…The idea of the HAM was first presented by Liao [44,45] using the concept of homotopy. For solution development, the HAM scheme has certain advantages, such as the fact that it is free from small or large emerging parameters.…”

Section: Solution Methodologymentioning

confidence: 99%

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The Rotating Flow of Magneto Hydrodynamic Carbon Nanotubes over a Stretching Sheet with the Impact of Non-Linear Thermal Radiation and Heat Generation/Absorption

et al. 2018

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Abstract:The aim of this research work is to investigate the innovative concept of magnetohydrodynamic (MHD) three-dimensional rotational flow of nanoparticles (single-walled carbon nanotubes and multi-walled carbon nanotubes). This flow occurs in the presence of non-linear thermal radiation along with heat generation or absorption based on the Casson fluid model over a stretching sheet. Three common types of liquids (water, engine oil, and kerosene oil) are proposed as a base liquid for these carbon nanotubes (CNTs). The formulation of the problem is based upon the basic equation of the Casson fluid model to describe the non-Newtonian behavior. By implementing the suitable non-dimensional conditions, the model system of equations is altered to provide an appropriate non-dimensional nature. The extremely productive Homotopy Asymptotic Method (HAM) is developed to solve the model equations for velocity and temperature distributions, and a graphical presentation is provided. The influences of conspicuous physical variables on the velocity and temperature distributions are described and discussed using graphs. Moreover, skin fraction coefficient and heat transfer rate (Nusselt number) are tabulated for several values of relevant variables. For ease of comprehension, physical representations of embedded parameters such as radiation parameter (Rd), magnetic parameter (M), rotation parameter (K), Prandtl number (Pr), Biot number (λ), and heat generation or absorption parameter (Q h ) are plotted and deliberated graphically.

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Model for thermal conductivity of carbon nanotube-based composites

Cited by 591 publications

References 16 publications

Fluid flow and heat transfer of carbon nanotubes along a flat plate with Navier slip boundary

Fluid flow and heat transfer of carbon nanotubes along a flat plate with Navier slip boundary

Entropy Generation Analysis for a CNT Suspension Nanofluid in Plumb Ducts with Peristalsis

The Rotating Flow of Magneto Hydrodynamic Carbon Nanotubes over a Stretching Sheet with the Impact of Non-Linear Thermal Radiation and Heat Generation/Absorption

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