Heat Transfer Performance and Flow Dynamics of Al2O3/Water Nanofluid in Turbulent Regime

Abu Raihan Ibna Ali; Tafsirul Hassan; Bodius Salam; Tania Akter

doi:10.38032/jea.2024.02.004

Authors

Abu Raihan Ibna Ali Department of Mechanical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh
Tafsirul Hassan Department of Mechanical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh
Bodius Salam Department of Mechanical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh
Tania Akter Department of Biomedical Engineering, Chittagong University of Engineering & Technology, Chattogram-4349, Bangladesh

DOI:

https://doi.org/10.38032/jea.2024.02.004

Keywords:

Nanofluid, Heat Transfer, Al2O3/Water, Thermal Performance Factor

Abstract

Rapid heat transfer is one of the major concerns in the growing engineering disciplines. Nanofluid has added a new dimension to rapid heat transfer because of its improved thermophysical properties. In this current investigation, investigation was carried out for 0.1% and 0.2% Al₂O₃/Water nanofluid in turbulent flow. Constant heat flux was supplied in the test section tube with the help of nichrome resistance wire which was spirally winded uniformly on the test section tube. The investigation reveals that the heat transfer coefficient and dimensionless Nusselt number enhance for Al₂O₃/water nanofluid than water as the working fluid. Heat transfer coefficient also improves with the increase in volume fraction of nanoparticles though the stability of nanofluid decreases. Nusselt number increases by 33.46% for 0.1% Al₂O₃/water nanofluid compared to water. Conversely, the Nusselt number increases by 57.01% for 0.2% Al₂O₃/water nanofluid compared to water. A higher thermal performance factor was found for a higher volume fraction of nanoparticles. Friction factor and pumping power per unit length also increase with the increase in the volume fraction of nanoparticles. It was concluded that Al₂O₃/water nanofluid with a higher volume fraction of nanoparticles gives a higher heat transfer rate for the same pumping power per unit length than water as a working fluid.

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