Experimental analysis of thermal expansion of nanofluidsMajlesi Journal of Energy Management
In the current contribution, attention is focused to experimentally measure the volumetric thermal expansion coefficient for several water–based nanofluids under different temperature conditions. For this purpose, Al2O3–water, CuO–water, TiO2–water, Al2O3–CuO–water, and Al2O3–TiO2–water nanofluids are analyzed and the corresponding results are compared with that of pure water. Water as well as the nanofluids with different nanoparticle fractions are heated gradually in the volumetric flask from 30°C to a maximum of about 80°C and their volume increases are recorded for each 10°C temperature rise. Thereafter, the volumetric thermal expansion coefficients are evaluated from the measured data. The results provide evidence that, addition of the nanoparticles to the base fluid leads to increase in the volumetric thermal expansion coefficient. In spite of that, it is found that presence of two different nanoparticles in the base fluid diminishes the nanofluid expansion.
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