FLOW PATTERNS AND PRECIPITATION OF INCLUS IONS IN SLAB MOLDS

Formation of flow profiles in the molten strand core. Observation of t he separation of inclusions in the mould and the emergence of inclusio n profiles. Calculation of flow patterns on the basis of Navier-Stokes equations in combination with a turbulence model. Laboratory measurem ent of flow profiles in wa ter models and comparison of these with com puted results. Description of the particle patterns in the strand core by means of an transport equation containing lift, convention and tur bulent dispersion. Appropriateness of calculations for vertical and bo w-type casters. Illustration of the calculated flow patterns and inclu sion concentration profiles. Influence of particle rise rate, slab wid th, casting speed and type of equipment. Emergence of width profiles, illustration of separation rates as a function of the casting conditio ns by means of simplified equations and diagrams.