| Deterministic physical influence control of interface motion with time dependent boundary cooling is presented for ice-water solidification processes. The required time dependent boundary conditions are predicted by an inverse numerical method to produce a desired phase interface motion. By applying the predicted boundary temperatures from the numerical simulation to the bottom surface of a test cell in an experimental study, the ice-water interface movements for various desired interface motions could be controlled. The experimental study was performed in a rectangular test cell and cases of different phase interface movements were considered. In the LabVIEW environment, the control process was implemented automatically and the temperatures were measured by a group of thermocouples. It was observed that different phase interface motions occurred at varying interfacial temperature gradients, thereby having structural impact on the resulting solidified materials. It was also observed that water supercooling occurred during the ice-water solidification process. Its effects on the phase interface processes were noted. Comparisons between measured and desired phase interface positions during the ice-water solidification processes show close agreement. As a result, it is considered that the current studies give useful contributions over past control schemes based on non-deterministic methods. |
