Computer Simulation Of Microstructure During The Ohno Continue Casting Processes

In this paper, the macro-microscopic model of microstructure simulation during the Ohno Continue Casting processes has been developed. Using this model, we have studied the crystal competent growth in the 0. C. C processes, and the influences of different parameter on the shape of liquid/solid interface and the structure evolution of single crystal. At the macroscopic level, the heat diffusion equation is solved with a temperature compensation formulation using a DFDM implicit scheme. The microscopic model takes into account nucleation of new grains in the undercooled melt, the kinetics of the dendrite tips. The continuous distribution of nucleation sites used in modeling of equiaxed solidification means that the grain density is given by simply the integral of the distribution at a given undercooling. According to the character of solidification of the Ohno Continue Casting processes, a dynamic macro-microscopic coupling arithmetic has been developed. The Macro-microscopic modeling can be used to predict grain competent growth and grain structure features. Based upon a two dimensional Cellular-Automaton technique, the visualization of the grain structure can be achieved. The simulated microstructures are similar to the experiment results.