Abstract
A model has been proposed here for estimating the thermal conductivity of a nanofluid based on the mechanism that the nanoparticles dispersed within the nanofluid undergo Brownian motion and repeatedly collide with the heat source. Molecular dynamics (MD) simulation has shown that there is a pulse-like heat pick up by the nanoparticles within 10–50 ps during the collision. After the collision the nanoparticles undergo Brownian motion in the base fluid and release the excess heat to the surrounding fluid within 2–5 ms. The thermal evolution during Brownian motion of the nanoparticles has been modeled by stochastic analysis. Simulations have shown that the additional heat transfer caused by the collision of the nanoparticles with the heat source contributes significantly to the characteristic thermal conductivity of the nanofluid. The prediction of the present model has shown a reasonable agreement with the experimental data available in literature for ethylene glycol based copper nanofluid.
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© 2013 TMS (The Minerals, Metals & Materials Society)
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Ghosh, M.M., Rai, R.K. (2013). Modelling Heat Transfer in Nanofluids Based on Coupled Md-Stochastic Simulation. In: Marquis, F. (eds) Proceedings of the 8th Pacific Rim International Congress on Advanced Materials and Processing. Springer, Cham. https://doi.org/10.1007/978-3-319-48764-9_348
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DOI: https://doi.org/10.1007/978-3-319-48764-9_348
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-48586-7
Online ISBN: 978-3-319-48764-9
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