Modeling the Droplet Impact on the Substrate with Surface Preparation in Thermal Spraying with SPH

Abstract The properties of thermally sprayed coatings depend heavily on their microstructure. microstructure is determined by the dynamics impact droplets substrate surface and subsequent overlapping previously solidified deformed droplets. Substrate preparation prior to spraying ensures strong adhesion coating. This includes roughening preheating surface. In present study, smoothed particle hydrodynamics (SPH) method used model Al 2 O 3 a preheated roughened A semi-implicit enthalpy–porosity applied simulate solidification process in mushy zone. addition, an implicit correction for SPH simulations improve performance stability simulation. To investigate heat transfer contact between droplet, discretization also taken into account. results show that studied conditions affect splat morphology process. Subsequently, simulation multiple coating formation performed analyzed.