Fundamentals and Transport Properties of Nanofluids
Chapter 6: Thermal Conductivity of Nanofluids – Experiments, Models, and their Advancements
Published:21 Dec 2022
T. M. Koller, F. E. Berger Bioucas, A. P. Fröba, 2022. "Thermal Conductivity of Nanofluids – Experiments, Models, and their Advancements", Fundamentals and Transport Properties of Nanofluids, S M Sohel Murshed
Download citation file:
Nanofluids represent a class of heterogeneous systems or dispersions, which consist of a continuous liquid dispersion medium and a dispersed phase of solid nanoparticles in the nanometer range.1 For the nanoparticles, typically employed materials are metals, metal oxides, and carbon materials, while water and ethylene glycol represent commonly used liquids. A key thermophysical property and, in specific, transport property, characterizing nanofluids and their performance in applications, is the effective thermal conductivity λeff as a measure of the ability of a material to conduct heat. Since the thermal conductivity λ in units of W · m−1 · K−1, is a single-phase property, the additional term “effective” is required for nanofluids, considering that they refer to multiphase systems with at least two phases.2 Yet, the term is omitted throughout this chapter due to simplicity reasons.