An experimental investigation of rheological characteristics of non- Newtonian nanofluids
Publish place: Journal of Heat and Mass Transfer Research، Vol: 1، Issue: 1
Publish Year: 1393
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JHMTR-1-1_003
تاریخ نمایه سازی: 24 شهریور 1403
Abstract:
Rheological characteristics of Al۲O۳, CuO and TiO۲ nano particles were investigated in oil asthe base fluid at ۱ and ۲ wt.%. Constitutive relations for non-Newtonian fluid were discussedbased on the power-law model. Measured viscosities of each nanofluid were used to evaluatethe power-law and consistency index. Results indicated that the nanofluid viscosity decreasedby increasing the concentration. Oil showed shear thickening behavior while nanofluids showedshear thinning behavior. An increase in nano-particle concentration caused a decrease in thepower-law index beside an increase in the consistency index. Moreover, the present studyshowed that the effective viscosity of fluids would be decreased by nanoparticle addition atsome wt.% and some shear rates. Furthermore, results showed that the classic models fornanofluid viscosity couldn’t predict their real values of nano fluid viscosity, as the measuredvalues are less than the predicted ones.
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Authors
Milad Tajik Jamal-Abad
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
Maziar Dehghan
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
Seyfolah Saedodin
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
Mohammad Sadegh Valipour
Faculty of Mechanical Engineering, Semnan University, Semnan, Iran
Amirhossein Zamzamian
Materials and Energy Research Center (MERC), Karaj, Iran
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