Author(s): D. A. Sandell

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Keywords: No Keywords

Abstract: Carbamide NH2C0NH2 (Urea) has been proposed as a dopant for model ice because of its desirable physical properties and non-corrosive and non-toxic chemistry. A series of ice sheets using two different urea concentrations was run at the CRREL Test Basin to develop growth curves over time at a constant temperature. The heat transfer coefficient for the test basin was estimated using nonlinear regression techniques and was used, along with temperature, as the key parameter in the heat transfer analysis differential equation whose solution was the Ice growth prediction model. Variation in crystal structure was observed to profoundly affect ice strength and modulus because of the amount of urea entrapped. The conditions which bring about these variations were explored and partially Identified. A fractional factorial experimental design was employed.

DOI:

Year: 1981