Abstract
Nowadays, nanofluids proved as a capable choice to the traditional heat transfer agents. In this study, Nickel (Ni)-distilled water (DW) nanofluids consisting sodium dodecyl benzene sulfonate (SDBS) dispersant at 0.1 vol.% and 0.3 vol.% are coined by two-step technique. The Ni nanomaterials are characterized by energy-dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). The temperature and nanomaterial volume fraction dependent thermal conductivity is accurately estimated through 3ω technique within the range of the temperature of 30°C-60°C. The experimental results show that the thermal conductivity improves with increasing Ni concentration and temperature. Further, this study discusses the factors affecting the thermal conductivity of Ni nanomaterial dispersed DW and possible thermal conductivity enhancing mechanisms of different volume fractions of Ni-DW nanofluids.
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