Enhancing heat transfer in nanofluids by carbon nanofins

Details Enhancing heat transfer in nanofluids by carbon nanofins Enhancing heat transfer in nanofluids by carbon nanofins

2010-11-17

arxiv.org/abs/1011.4007v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Submitted to: Nanoscale Research Letters

Scientific paper

Nanofluids are suspensions of nanoparticles and fibers which have recently attracted much attention due to their superior thermal properties. Here, nanofluids are studied in the sense of nanofins transversally attached to a surface, so that dispersion within a fluid is mainly dictated by design and manufacturing processes. We focus on single carbon nanotubes thought as nanofins to enhance heat transfer between a surface and a fluid in contact with it. To this end, we first investigate the thermal conductivity of those nanostructures by means of classical non-equilibrium molecular dynamics simulations. Next, thermal conductance at the interface between a single wall carbon nanotube (nanofin) and water molecules is assessed by means of both steady-state and transient numerical experiments. Numerical evidences suggest a pretty favorable thermal boundary conductance (order of $10^{-7}$ $[W m^{-2} K^{-1}]$) which makes carbon nanotubes ideal candidates for constructing nanofinned surfaces.

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