The Impact of Nanofluids on Droplet/Spray Cooling of a Heated Surface: A Critical Review

Yunus Tansu Aksoy, Yanshen Zhu, Pinar Eneren, Erin Koos and Maria Rosaria Vetrano
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Yunus Tansu Aksoy: Department of Mechanical Engineering, Division of Applied Mechanics and Energy Conversion (TME), KU Leuven, B-3001 Leuven, Belgium
Yanshen Zhu: Department of Chemical Engineering, Soft Matter, Rheology and Technology (SMaRT), KU Leuven, B-3001 Leuven, Belgium
Pinar Eneren: Department of Mechanical Engineering, Division of Applied Mechanics and Energy Conversion (TME), KU Leuven, B-3001 Leuven, Belgium
Erin Koos: Department of Chemical Engineering, Soft Matter, Rheology and Technology (SMaRT), KU Leuven, B-3001 Leuven, Belgium
Maria Rosaria Vetrano: Department of Mechanical Engineering, Division of Applied Mechanics and Energy Conversion (TME), KU Leuven, B-3001 Leuven, Belgium

Energies, 2020, vol. 14, issue 1, 1-33

Abstract: Cooling by impinging droplets has been the subject of several studies for decades and still is, and, in the last few years, the potential heat transfer enhancement obtained thanks to nanofluids’ use has received increased interest. Indeed, the use of high thermal conductivity fluids, such as nanofluids’, is considered today as a possible way to strongly enhance this heat transfer process. This enhancement is related to several physical mechanisms. It is linked to the nanofluids’ rheology, their degree of stabilization, and how the presence of the nanoparticles impact the droplet/substrate dynamics. Although there are several articles on droplet impact dynamics and nanofluid heat transfer enhancement, there is a lack of review studies that couple these two topics. As such, this review aims to provide an analysis of the available literature dedicated to the dynamics between a single nanofluid droplet and a hot substrate, and the consequent enhancement or reduction of heat transfer. Finally, we also conduct a review of the available publications on nanofluids spray cooling. Although using nanofluids in spray cooling may seem a promising option, the few works present in the literature are not yet conclusive, and the mechanism of enhancement needs to be clarified.

Keywords: nanofluid; heat transfer; droplet cooling; spray cooling; nanofluid synthesis; nanofluid stabilization (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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