کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5408791 1506539 2017 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Non-Newtonian power-law behavior of TiO2/SAE 50 nano-lubricant: An experimental report and new correlation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Non-Newtonian power-law behavior of TiO2/SAE 50 nano-lubricant: An experimental report and new correlation
چکیده انگلیسی
In the present study rheological behavior of SAE 50w Engine Oil containing TiO2 nanoparticles of 30 nm is empirically investigated. Various samples of nano-lubricant were made by adding nanoparticles in 0%, 0.125%, 0.25%, 0.5%, 0.75%, 1% and 1.5% solid volume fractions. Dynamic viscosity of the samples was measured in temperature ranges of 25 to 50 °C and in various shear rates. The results clearly showed that the nano-lubricant as well as the base oil was non-Newtonian fluids behaving as power-law equation. From the values of power law index it was revealed that the nano-lubricant exhibited shear thinning behavior, though in high solid volume fractions it tends to Newtonian behavior. With using viscosity data, a new correlation is proposed in terms of temperature and solid volume fraction which has R-squared values of 0.9751. Margins of deviation for experimental data prediction were < 1.52%. Nano-lubricant was studied to determine its sensitivity to adding a specific extra amount of nanoparticles. It was revealed by the results that the nano-lubricant is more sensitive to solid volume fraction variations than variations of temperature; the sample with 1% solid volume fraction had the maximum sensitivity at 25 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 232, April 2017, Pages 219-225
نویسندگان
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