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Numerical models for the calculation of thermal conductivity and rheology behavior of alumina and multi-walled carbon nanotube (MWCNT) nanofluids were evaluated by determining these properties experimentally and comparing the results to the models. The thermal conductivity was measured by the transient plane source method, and the dynamic viscosity was determined using a rotational rheometer. A new model was then developed for these nanofluids, including the effects of interfacial thermal resistance. ...
The thermal conductivity and dynamic viscosity of Al2O3-ethylene glycol and TiO2-ethylene glycol nanofluids have been determined as a function of the nanoparticle volume fraction (from 1 to 3 %) and temperature. It was determined that the thermal conductivity increased with increasing temperature as well as with increasing particle volume fraction for both types of nanofluids, but increasing the particle volume fraction caused a more significant increase than increasing the temperature. ...
The effects of silver nanowire size on the thermal conductivities of ethylene glycol-based nanofluids were investigated experimentally. The effects of altering the loading concentration of nanowires, and altering the temperature were also investigated. In addition to this, an investigation into the effects of the nanowire dimensions on the rheological properties of the nanofluids was also conducted. Theoretical models were then developed based on the experimental results....
The transient plane source (TPS) method was used to measure the thermal conductivity of automotive coolants, as well as equivalent nanofluids to these coolants. The results of the study indicated that the TPS was able to accurately measure the thermal conductivity, with an error of between 2 and 4%....
Octane solutions containing metal salts were irradiated with 350 nm photons using oleoyl sarcosine as a particle stabilizer and benzophenone as a particle sensitizer to produce suspensions of nanometer-sized metal particles. The goal of this study was to prepare nanofluids with enhanced thermal conductivity in comparison to pure octane. It was found that the thermal conductivities were enhanced by the production of the nanofluids, with a 10 % enhancement being observed at 50oC....
