Advanced Modeling of InP Crystal Growth by the MLEK Process

摘要

Two and three dimensional flow of a low Prandtl number liquid metal is investigated including the effects of heating, crucible and crystal rotation, and axial magnetic fields. The crucible shape and aspect ratio are also varied to determine their effects. A specially designed spectral element method for axisymmetric geometries is used. Axisymmetric flows that are stabilized with the use of rotation may be unstable to three dimensional disturbances leading to chaotic behavior. Axial magnetic field may have a stabilizing effect on the flow, leading to axisymmetry; however, surprisingly, large magnetic field strengths leads to strengthening of the axial vorticity and consequently strong three dimensionality and new instabilities.