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Numerical Study of Turbulent Flow and Heat Transfer of Nanofluids in Pipes


Veröffentlichungsart
Begutachtete Publikation

Fakultät/Einrichtung
Natur und Technik

Institutszugehörigkeit
Julius Robert Mayer - Institut für Energietechnik
http://www.hs-bremen.de/internet/de/forschung/einrichtungen/jrmi/

Verfasser
Smolen, Slawomir, Prof. Dr.-Ing.
Baars, Albert, Prof. Dr.
Boertz, Henrik
Cieslinski, Janusz T.

Autor_innen, Jahr, Titel
Boertz, H., Baars, A., Cieslinski, J.T., Smolen, S.
2017, Heat Transfer Engineering

Weitere Informationen
Heat Transfer Engineering, Taylor & Francis Group
Volume 39, 2018 - Issue 3
ISSN: 0145-7632 (Print), 1521-0537 (Online)

Anmerkung
Abstract:

In this work, Nusselt number and friction factor are calculated numerically for turbulent pipe flow (Reynolds number between 6000 and 12000) with constant heat flux boundary condition using nanofluids. The nanofluid is modeled with the single-phase approach and the simulation results are compared with correlations from experimental data. 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. The mean deviation is in the range of −5%. Friction factor values show a mean deviation of 0.5% 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 rate.



 

 

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