کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4994245 1458028 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermophysical and dielectric profiles of ethylene glycol based titanium nitride (TiN-EG) nanofluids with various size of particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
Thermophysical and dielectric profiles of ethylene glycol based titanium nitride (TiN-EG) nanofluids with various size of particles
چکیده انگلیسی
In this study, thermophysical properties such as thermal conductivity, rheological behavior and surface tension of ethylene glycol (EG) based nanofluids containing titanium nitride (TiN) nanoparticles with volume fraction ranging from 0.0022 to 0.0111 and with various nanoparticle sizes have been experimentally investigated at constant temperature. In addition, dielectric properties of these nanofluids were also measured at same temperature and discussed in detail. It is shown that nanoparticle content increase leads to similar trends for nanofluids properties, while nanoparticle size has different effect following the studied property. Actually, thermal conductivity and surface tension of nanofluids are higher with smaller nanoparticles for same nanoparticle content. Following the nanoparticle content, a transition from Newtonian nature of nanofluids to shear-thinning yield stress material with viscoelastic structure occurs. Lower the nanoparticle size, higher is the viscoelastic structure and the yield stress when they are present. Thixotropy of the nanofluids was also reported and depends both on concentration and size of nanoparticles. Both dielectric properties and electrical conductivity of TiN-EG nanofluids increase with nanoparticle content and are higher for suspensions containing bigger nanoparticles. Moreover, experimental data for thermal and electrical conductivities enhancement were modeled and compared to existing correlations, simple linear relationships were also proposed considering the effect of nanoparticle content and average size.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Heat and Mass Transfer - Volume 113, October 2017, Pages 1189-1199
نویسندگان
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