Study of the Impact of Water-Silica Nanofluid Drop on a Hot Surface Using the Singlephase Model

One of the very important cooling processes in industries is cooling via droplet spraying. In this research, the impact of Water-Silica nanofluid drop on a hot surface in the film boiling regime is studied. Governing equations are incompressible continuity, momentum and energy equations. The level set method is used for interface tracking and the ghost fluid method is used to impose discontinuities at the interface. The effect of adding nanoparticles and also impact velocity on the droplet contact time, droplet spreading and heat transfer from surface is investigated. Droplet spreading and heat transfer rate increase by an increase in impact velocity. But, the effect of impact velocity on the droplet contact time is negligible. Droplet contact time and spreading increase by an increase in nanoparticle’s volume fraction. Nanoparticles addition has more effect at higher impact velocities. Volume fraction enhancement, increases heat transfer rate and total heat dissipated from the surface.