An explanation of the Al2O3 nanofluid thermal conductivity based on the phonon theory of liquid

Fabrizio Iacobazzi, Marco Milanese, Gianpiero Colangelo, Mauro Lomascolo and Arturo de Risi

Energy, 2016, vol. 116, issue P1, 786-794

Abstract: In the present work a systematic investigation on several mechanisms affecting the thermal conductivity of Alumina based nanofluid, such as layering, Brownian motion, clustering, ballistic phonon motion, thermal boundary resistance and mass difference scattering, is presented. The effect of mass difference scattering is for the first time suggested and studied in the present work. Both theoretical and experimental approaches have been carried out in order to analyze the competition of these phenomena and to identify the most relevant. This was obtained by comparing micrometric and nanometric particles suspended in liquid water (293 K), frozen water (253 K) and diathermic oil (293 K). Each of the above-mentioned conditions was selected to make dominant only one of the mechanisms that affect nanofluid thermal conductivity. The main results of this investigation concern the mass difference scattering, which has been found to be the most intensive mechanism reducing the nanofluid thermal conductivity with respect to the microfluid one.

Keywords: Phonon scattering; Nanofluid; Microfluid; Alumina; Thermal conductivity; Heat transfer (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:116:y:2016:i:p1:p:786-794

DOI: 10.1016/j.energy.2016.10.027

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