The research of “Investigation to improve the secondary steel manufacturing process by adopting mathematical models“ was considered to contribute to the Strategic Steel Research in Sudan. The project was suggested as a close collaboration between Department of mechanical engineeringUniversity of Karrary and the steel factories in Sudan. Steel cleanliness, which is aim of this project, is a focal point for Sudan young steel industry in order to maintain and strengthen their inmarket and global competitiveness.The steady velocity fields were obtained by computationally solving, the ReynoldsAveraged NavierStrokes (RANS) equations using the standard kε and kω models of turbulence. These flow fields are then implemented to predict the inclusion removal by solving the inclusion transport equationnumerically.The Volume of Fluid(VOF) method was employed to model the behavior of the interfaces of the liquid steel – liquid slag – air system (to evaluate slag entrapment.) usinga twodimensional, transient solution. The calculations were carried out using the commercial Computational Fluid Dynamics (CFD) software ANSYSFLUENT 6.3.26. The models results were compared and validated with experiments results, plant measurements and models reported in the open literature. The predicted inclusion separation fractions to the top surface (slag) were compared and well agreed with the published data from [2] [3]. The computed results of the interface tracking between slag and steel had revealed that the “entrapment” of fine slag portions into liquid steel was occurred in the system of the present model configuration. The project findings considered as first step and intended to be hopefully applied in the steel factories in Sudan.
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