J. Mostaghimi, University of Toronto, Toronto, ON, Canada; H. B. Parizi, Simulent Inc., Toronto, ON, Canada; L. Rosenzweig, GE Global Research, Niskayuna, NY; L. Pershin, Centre for Advanced Coating Technology, University of Toronto, Toronto, ON, Canada
In this work we present the numerical simulation results of high speed impact of molten zirconia droplets on different micro-scale patterned surfaces. The simulations are performed using a three-dimensional finite difference method solving full Navier Stokes Equation with heat transfer and phase change. Volume of fluid (VOF) tracking algorithm is used to track the droplet free surface. Thermal contact resistance at the droplet–substrate interface is also included in the model. Specific attention is paid to the simulation of droplet impact under plasma spraying conditions. The droplet sizes will range from 5 to 20 microns with the initial velocities of 150-200 m/s. The results would show the effect of roughness on the splat shape and pattern. Different splat morphologies will be compared with those obtained from the experimental results under the same impact and surface conditions.
Summary: In this work we present the numerical simulation results of high speed impact of molten zirconia droplets on different micro-scale patterned surfaces.
