Nanofluid heat transfer and boiling enhancement mechanism: A molecular dynamics study

This study presents a detailed molecular dynamics (MD) simulation to compare the boiling behaviors of pure water and nanofluid (water with nanoparticles) droplets on a copper surface. The primary focus is on understanding the enhanced heat transfer mechanisms facilitated by the presence of nanoparticles. MD simulations were employed to capture atomic-level interactions and phase transitions, enabling insights into the dynamics of vapor bubble formation. Results indicate that nanoparticles significantly accelerate nucleation by providing additional active sites, leading to a higher frequency and density of vapor bubble formation. The high thermal conductivity of nanoparticles creates localized hot spots, enhancing the overall heat transfer efficiency. Additionally, the dynamic behavior of nanoparticles contributes to a more uniform temperature distribution, promoting a consistent and vigorous boiling process. Compared to pure water, nanofluids exhibit a more rapid and complete phase transition, achieving higher boiling heat transfer coefficients. These findings underscore the potential of nanofluids for applications requiring efficient heat dissipation, such as high-performance computing and advanced cooling systems. Future research directions include optimizing nanoparticle concentration, size, shape, and exploring different nanoparticle materials to further enhance boiling efficiency and heat transfer performance.