Study on effect of nanoparticles on boiling phase transition by using molecular dynamics simulation

The effects of nanoparticles on phase transition of Ar/Cu nanofluid were performed by adopting non-equilibrium molecular dynamics (NEMD) simulation. For the study of nanofluid phase transition phenomena, the physical parameters of the nanofluid such as total energy, temperature, density, the number of gas atoms, and thermal conductivity of Ar/Cu nanofluid were calculated. By adding more nanoparticles into Ar fluid, the temperature rise rate decreased and the phase transition time occurred in more time. Phase transition time was delayed by up to 24.7%. The results showed that increasing the number of nanoparticles led to more Ar atoms within the solid–liquid interaction forces. Furthermore, the thermal conductivity of Ar/Cu nanofluid was calculated by using the Green–Kubo and NEMD methods. The enhancement of thermal conductivity of nanofluid can be up to 12.5% compared with base fluid, and the maximum thermal conductivity was 0.64 W/mK. The heat flux enhanced with more nanoparticles.