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On the proper interpretation of nanofluid convective heat transfer

conference contribution
posted on 22.03.2021, 16:54 by Matthias H. Buschmann, R Azizian, Tobias Kempe, JE Juliá, Raul Martinez-Cuenca, Bengt Sunden, Zan Wu, A Seppälä, Tapio Ala-NissilaTapio Ala-Nissila
Technological developments of the last decades allow the production and the dispersion of particles of sizes ranging between 10 and 100 nm in liquids. In a large number of recent studies the resulting nanofluids have been reported to display anomalously high increase in convective heat transfer. The present study compiles experiments from five independent research teams investigating convective heat transfer in nanofluid flow in pipes (laminar and turbulent), 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 water based nanofluids. The experiments are theoretically supported by a fundamental similarity analysis of nanoparticle motion in nanofluid flow.

History

School

  • Science

Department

  • Mathematical Sciences

Published in

International Heat Transfer Conference 16

Volume

2018-August

Pages

2855 - 2862

Source

16th International Heat Transfer Conference (IHTC-16)

Publisher

Begell House

Version

NA (Not Applicable or Unknown)

Rights holder

© International Heat Transfer Conference

Publisher statement

This paper was accepted for publication in International Heat Transfer Conference 16 and the definitive published version is available at https://doi.org/10.1615/ihtc16.cov.022834.

Acceptance date

01/08/2018

Publication date

2019-01-01

Copyright date

2018

ISSN

2377-424X

Language

en

Location

Beijing, China

Event dates

10th August 2018 - 15th August 2018

Depositor

Prof Tapio Ala-Nissila. Deposit date: 18 March 2021

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