An Investigation of the Heat Transfer at the Liquid/Solid Interface of Rapidly Melting Ice

摘要

This paper describes an experimental and analytical investigation of a system capable of rapidly melting ice. The melting technique used involved forcing a cylindrical ice slug against a heated surface, letting the effluent fluid exit radially. An analytical model based on fundamental physical principles was developed and used to predict the behavior of the system. Liquid layer thickness, liquid bulk temperature, radial pressure distribution in the liquid layer, convective heat transfer coefficient, and ice melt rate were all computed for steady state operation of the system. Experiments were performed to verify the model predictions. The tests measured the ice melt velocity and exit bulk temperature at a known supply pressure. The input heat flux was determined using two independent methods of calculation. One technique found the conduction heat flux leaving the heated block by using two heated block temperature measurements spaced a known distance apart near the liquid/block surface. The second method applied the measured ice melt velocity and liquid bulk temperature to an energy balance on the liquid film to yield an input heat flux value. A comparison of the experimental results with the analytical model predictions is made demonstrating satisfactory agreement. (Author)