Open Access

ARTICLE

Thermal Effects on the Spreading and Solidification of a Micrometric Molten Particle Impacting onto a Rigid Substrate

S. Oukach^1,2,3, H. Hamdi², M. El Ganaoui⁴, B. Pateyron¹

1 Laboratory of Science of Ceramic Processes and Surface Treatments, (SPCTS UMR 6638 CNRS), University of Limoges, Limoges, France
2 Laboratory of Fluid Mechanics and Energetic (LMFE URAC 27 CNRST), FSSM, Cadi Ayyad University, Marrakech, Morocco
3 soufiane.oukach@etu.unilim.fr
4 Laboratory of Studies and Research on Wood (LERMAB), Institut Carnot, Henri Poincaré University, Nancy, France

Fluid Dynamics & Materials Processing 2012, 8(2), 173-196. https://doi.org/10.3970/fdmp.2012.008.173

Abstract

The splat formation is one of the basic processes in thermal spray coatings. The performance of these coatings is strongly related to the process of spreading and solidification of molten droplets. The aim of the present paper is to simulate the fluid flow, heat transfer and phase-change that occur when a micrometric molten droplet impacts onto a rigid substrate and to examine the effect of the substrate conditions, such as initial temperature and material on the solidification time and spreading process. The effect of thermal contact resistance is also investigated. The simulation model used is based on the Navier-Stokes equations and the energy equation which includes convection and phase change. These equations are coupled with the Level Set function to track the interface between molten particle and surrounding air. The numerical model is solved using Finite Element Method and Comsol multiphysics 3.5a software.

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Keywords

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