Multiphase flow modeling of molten material-vapor-liquid mixtures in thermal nonequilibrium

This paper presents a numerical model of multiphase flow of the mixtures of molten material-liquid-vapor, particularly in thermal nonequilibrium It is a two-dimensional, transient, three-fluid model in Eulerian coordinates. T he equations are solved numerically using the finite difference method that implicitly couples the rates of phase changes, momentum, and energy exchan ge to determine the pressure, density, and velocity fields. To examine the model's ability to predict an experimental data, calculations have been per formed for tests of pouring: hot particles and molten material into a water pool. The predictions show good agreement with the experimental data. It a ppears, however, that the interfacial heat transfer and breakup of molten m aterial need improved models that can be applied to such high temperature, high pressure, multiphase flow conditions.