On the proper interpretation of nanofluid convective heat transfer

M. H. Buschmann*, R. Azizian, T. Kempe, J. E. Juliá, R. Martínez-Cuenca, B. Sundén, Z. Wu, A. Seppälä, T. Ala-Nissila

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Title of host publicationInternational Heat Transfer Conference
PublisherBegell House
Number of pages8
Publication statusPublished - 1 Jan 2018
MoE publication typeA4 Conference publication
EventInternational Heat Transfer Conference - Beijing, China
Duration: 10 Aug 201815 Aug 2018
Conference number: 16

Publication series

NameInternational Heat Transfer Conference
ISSN (Print)2377-424X


ConferenceInternational Heat Transfer Conference
Abbreviated titleIHTC


  • Conduction
  • Nanofluids
  • Thermophysical properties


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