Multiphase Model on Interfacial Heat Transfer for Water Quenching of Cylindrical Sample

Water quenching, as a common heat treatment process, has complex physical phenomena, in which phase change, bubbling and turbulence are involved. The emersion of part into water is in short period but vital to the performance of process and part quality, which is hard to be simulated. In this paper, the emersion of cylindrical sample has been modeled dynamically by using Ansys-CFX. The phase change of water to vapor has been presented on multiphase flow theory. A time-dependent distributed HTC will be shown as result. The simulation result shows the intense variation of heat exchange through the interface during emersion process between workpiece and liquid, and the unsteady distribution around the solid surface.