Effect of particle size on thermophysical and heat transfer properties of Ag nanofluid in a radiator - an experimental investigation

In this experimental and statistical investigation, Silver (Ag) nanoparticles with varying particle sizes of 20 nm with the base fluid of EG and DI water are tested to improve the heat transfer properties of the car radiator. The thermophysical properties are tested at temperatures varying from 35 to 75 degrees C. Results showed that small nanoparticles had higher thermophysical properties than large nanoparticles. The heat transfer properties along with friction factor characteristics are measured. A total of 20 nm of Ag has higher thermal transfer properties than other nanofluids; it can be concluded that smaller nanoparticles can improve thermal properties and minimize the radiator size compared to traditional coolants. A systematic optimized RSM-based architecture has been developed to define the quantitative estimate of the specific design parameters influencing nanofluid heat transfer properties and friction factor characteristics. Finally, correlations are developed for experimental Nusselt number and friction factor values by regression analysis.

Automated summary

In this study, the effectiveness of using silver nanoparticles of different particle sizes to improve the heat transfer properties of a car radiator was investigated. It was found that smaller nanoparticles exhibited higher thermophysical properties. Correlations were developed to estimate the heat transfer properties and friction factor characteristics based on experimental Nusselt numbers and friction factor values.