Abstract
The solidificaton or freezing phenomenon of a horizontal advancing molten metal flow in a metallic mold is analyzed. The intet molten metal is superheated and the mold temperature is initially kept lower than the solidfication temperature of the molten metal. The metal flow is assumed fully developed inside a smooth straight circular tube with a small radius. And the inlet pressure head are kept constant. Natural convection, supercooling, contact thermal resistance between the frozen layer and the mold are neglected. Due to the release of the latent heat during the phase change, a discontinuty of enthalpy function exists at the solid-liquid interace. This characteristic increases the difficulties of the analysis of such problems. AN enthalpy formulation is used in energy equation. The latent heat is separated from the total enthaply to be a part of the source term. There is no need to satisfy thermal boundary at the change interace. Peclet number is the most parameter in turbulent flow during the solidification process. The eddy diffusivity of heat is relative to Reynolds number. High Peclet number will increase the penetrating length. At the same time it will increase the axial heat transfer. Oweing to the effect of the eddy diffusivity of heat, it makes heat mix well. So the solidification time in turbulent flow is showrtter than in laminar flow.