The Interfacial Layer Effect on Thermal Conductivity of Nano-Colloidal Dispersions

Abstract

Abstract-A mathematical model has been proposed for calculating the effective Thermal Conductivity of nano colloidal dispersions by incorporating a thermal conductivity profile for the interfacial layer. The present model has been successfully applied to the colloidal dispersions containing rod shaped nanoparticles as well as those containing spherical nanoparticles. The results have also been compared with other existing models.Index Terms-Thermal conductivity, nanofluids, colloidal dispersion and interfacial layer.

A survey of practical equations for prediction of effective thermal conductivity of spherical-particle nanofluids

“…Recently, in a similar effort, Pasrija and Srivastava [86] assumed a variation for thermal conductivity within the nano-layer using hyperbolic tangents:…”

The role of several heat transfer mechanisms on the enhancement of thermal conductivity in nanofluids

“…There has been recently much attention paid to some particular heat transfer mechanisms in nanofluids, such as formation of a nano-liquid-layer around the nanoparticles (liquid layering) [13][14][15][16], particles clustering [17][18][19][20] and Brownian motion of particles [21][22][23].…”