Thermal Conductivity of Nano-fluids in Nano-channels
4th Micro and Nano Flows Conference (MNF2014)
- Publisher: Brunel University London
Nanochannel | Nanofluids | Argon | Copper | Molecular Dynamics | Thermal Conductivity | Nanofluidics | Heat transfer
This paper was presented at the 4th Micro and Nano Flows Conference (MNF2014), which was held at University College, London, UK. The conference was organised by Brunel University and supported by the Italian Union of Thermofluiddynamics, IPEM, the Process Intensification Network, the Institution of Mechanical Engineers, the Heat Transfer Society, HEXAG - the Heat Exchange Action Group, and the Energy Institute, ASME Press, LCN London Centre for Nanotechnology, UCL University College London, UCL Engineering, the International NanoScience Community, www.nanopaprika.eu.
The behaviour of an Argon-copper nano-fluid spatially restricted in a nano-channel is studied by
using Molecular Dynamics simulations. Specifically, the channel size and particle loading effects on nanofluids
thermal conductivity are investigated. A direct comparison is made between the calculated results and
the prediction of classical macroscopic models with the latter under-estimating the computed values by up to
20%. The thermal conductivity enhancement is correlated with the structure of Argon atoms close to the walls
of the channel and around the particle, whose solid like nature enables them to propagate heat more efficiently.