Numerical Study of SiO2–Water Nanofluid Jet Impingement on Heated Surface

In the present study, numerical analysis of slot jet impingement using SiO2–water nanofluid on flat surface is carried out. The slot jet width is 5 mm and the Reynolds number is fixed as 10,000. The flat surface is treated with thermal boundary condition of uniform temperature. The SiO2 solid particle volume fraction in nanofluid is spanning from 0 to 5%. The thermophysical properties of nanofluid is evaluated from mathematical expression which involves water properties and solid particle volume fraction. The dynamic viscosity of nanofluid is evaluated from three different models. The single phase property model is used for numerical simulation. The effect of particle volume fraction and separation distance on friction factor and Nusselt number is investigated. To consider combined effect of flow and heat transfer performance of jet impingement, the Performance Index is evaluated. With increasing particle volume fraction in nanofluid, Performance Index increases which indicates overall improvement of system efficiency.