Experimental Investigation of Hybrid Nanofluids Influence on Engine Oil Rheology and Associated Pumping Power Requirements
محورهای موضوعی : Fluid Mechanicsعباس کمالو 1 , davoud firouzi 2 , Mohammad Abbaszadeh 3
1 -
2 - 3 km, Daneshgah Boulevard, Minab, Hormozgan, Iran
3 - 3 km, Daneshgah Boulevard, Minab, Hormozgan
کلید واژه: Hybrid Nanofluids, Viscosity of hybrid nanofluid, Nanoparticles, Nanotechnology in Lubrication, Fluid Dynamics,
چکیده مقاله :
This study examines the rheological properties of Fe₃O₄-MWCNTs/Oil (SAE40) nanofluid, focusing on its behavior at temperatures ranging from 25°C to 50°C. Stable suspensions with solid volume fractions from 0.05% to 1.6% were prepared by dispersing Fe₃O₄-MWCNTs (80:20% vol.) in SAE40 oil. Viscosity measurements were performed across shear rates from 666.5 s⁻¹ to 9331 s⁻¹. The results confirmed that the nanofluid exhibits Newtonian behavior across all concentrations and temperatures. A notable increase in dynamic viscosity was observed with higher solid volume fractions, while viscosity decreased with rising temperature. The maximum viscosity enhancement achieved was 46%. Based on experimental data, a precise correlation was proposed to predict dynamic viscosity. Sensitivity analysis indicated that viscosity is more sensitive to changes in solid volume fraction than temperature. Additionally, the effect of nanofluids on pumping power required for oil flow was investigated, confirming their potential for thermal engineering applications.
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