2002 年 29 巻 2 号 p. 20-
Three-dimensional time-dependent flow of oxide melts in Czochralski system was numerically investigated under a condition of an accelerated crucible rotation technique (ACRT). The effect of double crucible method, which can separate feed material and a growing crystal, was also studies simultaneously to grow long crystals. The calculation clarified that the time-dependent crucible-rotation with acceleration can stabilize the convection of the melt effectively. Moreover, it has been clarified that the double crucible rotation technique can also stabilize convection of the melt due to existence an inner wall.