5th International Conference on Advances in Solidification Processes (ICASP-5) 5th International Symposium on Cutting Edge of Computer Simulation of Solidification, Casting and Refining (CSSCR-5)

The growth of faceted crystals occurs often in nature and industry, involving always the presence of flow. Insulin, silicon, pyrite, quartz, gallium are only few examples of faceted crystals. The present paper presents a numerical model for the simulation of facetted crystal growth, taken into account the incidence of flow. The growth in facetted crystals is the results of interface kinetics and flow hydrodynamics. This model was applied to the Fe2Al5 faceted crystal, presenting a hexagonal crystal shape. These facetted crystals (Fe2Al5), so called top dross particles are forming during the production of Zn coated steel sheets (Galvanizing industry). In the galvanizing industry their occurrence is a problem and therefore it should be limited. Comparison was made between simulation and experimental observation of crystal shape. The growth was found to be the result of the coupling between the interfacial kinetic and the hydrodynamic induced kinetics.