Loughborough University
Browse
1-s2.0-S1290072917310748-main.pdf (4.82 MB)

Correct interpretation of nanofluid convective heat transfer

Download (4.82 MB)
journal contribution
posted on 2018-05-18, 09:03 authored by M.H. Buschmann, R. Azizian, T. Kempe, J.E. Julia, R. Martinez-Cuenca, B. Sunden, Z. Wu, Ari Seppala, Tapio Ala-NissilaTapio Ala-Nissila
Engineers and scientist have a long tradition in trying to improve the thermophysical properties of convective heat carriers such as water and transformer oil. Technological developments of the last decades allow the dispersion of particle of sizes ranging between 10 and 100 nm in these liquids. In a large number of recent studies the resulting nanofluids have been reported to display anomalously high increase of convective heat transfer. The present study compiles experiments from five independent research teams investigating convective heat transfer in nanofluid flow in pipes, pipe with inserted twisted tape, annular counter flow heat exchanger, and coil and plate heat exchangers. The results of all these experiments unequivocally confirm that Newtonian nanofluid flow can be consistently characterized by employing Nusselt number correlations obtained for single-phase heat transfer liquids such as water when the correct thermophysical properties of the nanofluid are utilized. It is also shown that the heat transfer enhancement provided by nanofluids equals the increase in the thermal conductivity of the nanofluid as compared to the base fluid independent of the nanoparticle concentration or material. These results demonstrate that no anomalous phenomena are involved in thermal conduction and forced convection based heat transfer of nanofluids. The experiments are theoretically supported by a fundamental similarity analysis of nanoparticle motion in nanofluid flow.

Funding

This article is based upon work from COST Action CA15119 NANOUPTAKE, supported by COST (European Cooperation in Science and Technology). The authors R.M.C and J.E.J gratefully acknowledge the financial support from the Universitat Jaume I (projects P1-1B2013-43 and UJIB2016-47), Generalitat Valenciana (project VAL-2015-01), and Ministerio de Economia y Competitividad (project ENE2016-77694-R)." Study by M.H.B. has been carried out under MF090026 (Bundesministerium für Wirtschaft und Energie, Germany). B.S. and Z.W. acknowledge the support by Alfa Laval AB, Lund and the Swedish Research Council. T. A.-N. has been supported in part by the Academy of Finland through its Centre of Excellence grants 284621 and 287750, T.A.-N., and A.S. have been supported by Aalto University through its Energy Efficiency Program EXPECTS grant

History

School

  • Science

Department

  • Mathematical Sciences

Published in

International Journal of Thermal Sciences

Volume

129

Pages

504 - 531

Citation

BUSCHMANN, M.H. ... et al., 2018. Correct interpretation of nanofluid convective heat transfer. International Journal of Thermal Sciences, 129 (July), pp. 504 - 531.

Publisher

© The Authors. Published by Elsevier Masson SAS.

Version

  • VoR (Version of Record)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

2017-11-02

Publication date

2018

Notes

This article was published in the International Journal of Thermal Sciences [© The Authors. Published by Elsevier Masson SAS]. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/BY-NC-ND/4.0/).

ISSN

1290-0729

Language

  • en