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Energies 2018, 11(11), 3068; https://doi.org/10.3390/en11113068

Forced Convection of Pulsating Nanofluid Flow over a Backward Facing Step with Various Particle Shapes

1
Mechanical Engineering Department, Prince Sultan Endowment for Energy and Environment, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia
2
RAK Research and Innovation Center, American University of Ras Al Khaimah, Ras Al-Khaimah P.O. Box 10021, UAE
3
Department of Mechanical Engineering, Celal Bayar University, Manisa 45140, Turkey
*
Author to whom correspondence should be addressed.
Received: 15 October 2018 / Revised: 30 October 2018 / Accepted: 5 November 2018 / Published: 7 November 2018
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Abstract

In this study, numerical analysis of forced convective pulsating nanofluid flow over a backward-facing step with different nanoparticle shapes was performed by the finite volume method. The effects of the Strouhal number (between 0.1 and 2), solid nanoparticle volume fraction (between 0 and 0.04) and nanoparticle shapes (spherical, blade and cylindrical) on the heat transfer and fluid flow were examined with the aid of numerical simulation. It was observed that the average Nusselt number is a decreasing function of the Strouhal number for the considered range, and it enhances for higher solid particle fractions. Using nanofluids with spherical particles is advantageous in pulsating flow, whereas cylindrically-shaped particles are preferred in steady flow configurations. Average Nusselt number enhancements up to 30.24% and 27.95% are achieved with cylindrical- and spherical-shaped particles at the highest volume fraction. View Full-Text
Keywords: backward-facing step; pulsating flow; nanofluid; finite volume method backward-facing step; pulsating flow; nanofluid; finite volume method
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Chamkha, A.J.; Selimefendigil, F. Forced Convection of Pulsating Nanofluid Flow over a Backward Facing Step with Various Particle Shapes. Energies 2018, 11, 3068.

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