Global Instability of Rod Eutectic Growth in Directional Solidification

In our previous work, we obtained the uniformly valid asymptotic solution of a cylindrical rod eutectic. order to further study critical point stable growth eutectic, have considered unsteady eutectic on basis steady Based experimental system growth, combined with solidification thermodynamics and kinetics, mathematical model was established. We used analysis method seek analytical nonlinear stability theory analyze establish corresponding disturbance model. analytic form global mode quantization conditions find that there is mode, namely (ST-mode), for growth; when ε<εST0, stable, ε>εST0, unstable ε=εST0, neutral stability. The spacing succinonitrile(D)camphor (SCN-DC) predicted by us smaller than Jackson–Hunt, which consistent data. Finally, found region changed little temperature gradient.