Abstract
	This article presents the results achieved during optimisation of molten steel flow in the tundish of four-strand billet caster in TŽ, a.s. Experimental research was made by method of physical modelling on the model of tundish produced on the scale 1:3. We have tested altogether 27 versions of tundish inner configuration. This article presents also the results of investigation into origination of the outflow vortices in the field of the flowing-out sector of tundish at application of the s.-c. calibrated teeming nozzles.
	One of the basic tundish functions is distribution of steel among individual strands, which should be ensured in such a way, that the physical properties of steel in all strands would be the same. Steel in the individual strands should have the same temperature, chemical composition and purity from the point of view of nonmetallic inclusions and the same dynamic behaviour. The approach to this state is greatly dependent on the characteristics of molten steel flow in tundish.