Numerical analysis of molten pool heated by electron gun

It is necessary to know the characteristics of the metal molten pool in many fields. The velocity and temperature distribution of the two-dimensional pool in both the cold and the hot crucibles heated by the electron gun are analyzed by the Navier-Stokes equation under the real boundary condition. The relations between the evaporation rate and the power of the electron gun, the width of the electron beam I the volume of the crucible are studied in detail for the cold and hot crucibles. In general, the evaporation rate increases with the power of the electron gun increasing, the width of the electron beam decreasing ( except the width less than 0.5mm) and the volume of the crucible increasing, so the effective power use ratio of the electron gun increases. The evaporation rate of the hot crucible is higher if the electron beam is wider, otherwise the evaporation rate of the cold crucible is higher. The results are similar for iron, copper, gadolinium, aluminium and so on.