NUMERICAL-SIMULATION OF THE CONVECTION DURING ACRT

The water convection in the crucible during ACRT process is simulated with numerical method. It is shown that when the crucible is accelerat ed, a counterclockwise flow appears near the axis and the bottom of th e crucible, and when the crucible is decelerated, a clockwise flow app ears near the wall and the bottom of the crucible. They appear, develo p, and decline alternatively. The numerical trace of the marked partic les is compared with thar of water simulation experiment. When the cru cible rotates at a constant speed, the shape of the calculated free su rface is very close to that predicted by the theoretical formula, whic h proves that the treatment to the free surface is correct.