Abstract

The quality of thin strip products is determined by the flow and heat transfer in a molten pool of twin-roll casting, thus it is of great significance to study the structure parameters of the delivery system, including the angle and height of end face nozzle, the angle and height of side nozzle as well as the taper angle of side nozzle. A methodology for simulation of twin-roll thin strips continuous casting process under uncertainty is presented by a three-dimensional numerical model of the flow field and solidification of liquid steel in the molten pool. A sampling-based stochastic model is developed to elucidate the effects of uncertainty in several nozzle structure parameters on the variability of maximum outlet temperature difference and maximum liquid surface turbulence kinetic energy. The results show that taper angle of side nozzle significantly affects the variability in maximum outlet temperature difference, and the uncertainty in angle and height of end face nozzle as well as the height of the side nozzle affects the variability in maximum liquid surface turbulence difference evidently.

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