Flow and Heat Transfer of MHD Dusty Nanofluid over a Moving Plate with Constant Surface Temperature

Nanofluid is a type of fluid that contains nanometre-sized particles, which known as nanoparticles. When nanofluid is mixed with dust particles that contain millimetre-sized or micrometre-sized particles, it turns into dusty nanofluid. The presence of impurities in the nanofluid affects the fluid flow, which reduces the efficiency, pressure and the temperature differential. This paper considers the flow and heat transfer characteristics of dusty nanofluid over a moving plate in the presence of magnetohydrodynamic (MHD) with constant surface temperature. Three types of nanoparticles namely copper oxide (CuO), aluminium oxide (Al2O3) and titanium oxide (TiO2) are considered. The governing partial differential equations are converted into a system of non-linear ordinary differential equations using similarity transformation, then the non-linear ordinary differential equations are solved using bvp4c program in MATLAB software. The effect of non-dimensional governing parameters such as velocity ratio parameter, magnetic field parameter, volume fraction of the nanoparticle, volume fraction of the dust particle, mass concentration of the dust particle, fluid particle interaction parameter for velocity and fluid particle interaction parameter for temperature for fluid and dust phases of CuO-water, Al2O3-water TiO2-water dusty nanofluids are discussed and presented through graphs. The skin friction coefficient and Nusselt number are discussed and presented in tabular form. The numerical results are compared with previous existing results for validation. It is found that nanoparticles act as good thermal conductivity as well as show significant effect on velocity of fluid and dust phase.