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Numerical study of turbulent flow and heat transfer of nanofluids in pipes

Abstrakt

In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (6 000 < Re < 12 000) with constant heat flux boundary condition using nanofluids. The nanofluid is modelled with the single-phase approach and the simulation results are compared with experimental data of Vajjha et al. [1]. Ethylene glycol and water, 60:40 EG/W mass ratio, as base fluid and SiO2 nanoparticles are used as nanofluid with particle volume concentrations ranging from 0% to 10%. Nusselt number predictions for the nanofluid are in agreement with experimental results and a conventional single-phase correlation of Gnielinski [2]. The mean deviation is in the range of 5%. Friction factor values show a mean deviation of 1.5% to a conventional single-phase correlation, however, they differ considerably from the nanofluid experimental data. The results indicate that the nanofluid requires more pumping power than the base fluid for high particle concentrations and Reynolds numbers on the basis of equal heat transfer.

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Informacje szczegółowe

Kategoria:
Aktywność konferencyjna
Typ:
publikacja w wydawnictwie zbiorowym recenzowanym (także w materiałach konferencyjnych)
Tytuł wydania:
Thermal and Energy systems: Production, Storage, Utilization and the Environment ASME-ATI-UIT 2015 Conference strony 1 - 8
Język:
angielski
Rok wydania:
2015
Opis bibliograficzny:
Cieśliński J., Boertz H., Baars A., Smoleń S.: Numerical study of turbulent flow and heat transfer of nanofluids in pipes// Thermal and Energy systems: Production, Storage, Utilization and the Environment ASME-ATI-UIT 2015 Conference/ Neapol: , 2015, s.1-8
Weryfikacja:
Politechnika Gdańska

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