NUMERICAL-CALCULATION OF THE CRYSTAL ROTATION EFFECT ON YBA2CU3O7-X SINGLE-CRYSTAL GROWTH BY THE PULLING METHOD

A series of numerical calculations of convection were performed for th e YBa2Cu3O7-x (Y123) single crystal growth by the modified pulling met hod (Solute Rich Liquid Crystal Pulling method; SRL-CP method). The fi nite-difference method was used to calculate the steady state of the a xisymmetric two-dimensional incompressible viscous fluid system. The e ffect of the crystal rotation on the flow pattern and the temperature distribution in the melt was studied. An increase of the crystal diame ter and/or the crystal rotation rate increased the strength of the for ced convection in the melt, and as a result, the temperature at the cr ystal growth interface increased. These results were consistent with t he experimental results.