Carbon nanotube thermal transport: Ballistic to diffusive

Crossover from Ballistic to Diffusive Thermal Transport in Carbon Nanotubes

We present a theoretical scheme that seamlessly handles the crossover from fully ballistic to diffusive thermal transport regimes and apply it to carbon nanotubes. At room temperature, the micrometer-length nanotubes belong to the intermediate regime in which ballistic and diffusive phonons coexist, and the thermal conductance exhibits anomalous nonlinear tube-length dependence due to this coex...

Diffusive-Ballistic Heat Conduction along a Single-Walled Carbon Nanotube

The diffusive-ballistic heat conduction of finite-length single-walled carbon nanotubes has been studied by means of nonequilibrium molecular dynamics simulations. The length dependence of thermal conductivity [1] is quantified for a range of nanotube lengths up to 1.6 μm at room temperature. A gradual transition from nearly pure ballistic to diffusive-ballistic heat conduction was identified f...

Diameter and Length Effect on Diffusive-ballistic Phonon Transport in a Carbon Nanotube

We report a non-equilibrium molecular dynamics (MD) study on heat conduction of finite-length single-walled carbon nanotubes (SWNTs). The length and diameter dependences of the thermal conductivity are quantified for a range of nanotubelengths up to a micrometer at room temperature using two different temperature control techniques. A thorough investigation was carried out on the influence of i...

Thermal transport in multiwall carbon nanotube buckypapers

Ballistic and Diffusive Thermal Conductivity of Graphene