Non-Newtonian Nanofluids: A Novel Step in Enhancing Thermal System Performance

This paper provides a comprehensive review of the application of non-Newtonian fluids and nanofluids in thermal systems. Unlike Newtonian fluids, non-Newtonian fluids exhibit variable viscosity depending on the shear rate, which enhances thermal performance. The paper compares shear-thinning and shear-thickening fluids and investigates their benefits in thermal systems. Adding nanoparticles, such as copper oxide and aluminum oxide, to base fluids significantly improves heat transfer rates. For example, adding ۱۰% copper oxide increases the cooling rate by up to ۱۲.۸%. Furthermore, the paper examines the complex behavior of non-Newtonian nanofluids in microchannels and analyzes the impact of nanoparticle size and concentration on performance. Optimal conditions for achieving efficient thermal performance are also provided. Non-Newtonian nanofluids outperform pure non-Newtonian fluids in forced convective heat transfer and turbulent flow regimes. Potential applications of these fluids in heat exchangers, electronic cooling, and other industries are discussed. The study concludes that the use of non-Newtonian nanofluids can significantly enhance the thermal performance of systems by reducing pressure drop and pumping energy, leading to more efficient thermal management. This research underscores the importance of nanofluids in improving the functionality of thermal systems.

کلیدواژه ها:

Non-Newtonian Fluids ، Heat transfer ، Nanofluid ، Viscosity