EVOLUTION THEORY FOR OPTIMAL-CONTROL OF A COUETTE ICEFORM DESIGN-MODEL

The 'iceformation' method is a new technique for designing the shape of low-loss flow fixtures and bodies. Optimal selection of the flow and thermal control parameters is based on minimizing energy dissipation when the ice/water interface reaches steady state. A theoretical basis for selecting control parameters is established. An optimal criterion is derived using a Couette iceform model for a point on the ice/water interface and an evolution theory. The evolution process consists of dynamic variation and thermodynamic performance evaluation. The paper provides a theoretical foundation for conducting iceformation experiments and numerical simulation of analogous design processes.