Abstract
The growth rate of unconfined ice crystals along their basal plane has been measured in flowing subcooled water over the range of flow velocities from 1.30 to 46.0 cm/sec. and over the range of subcoolings from 0.02 to 0.60°C. For water velocities 8.0 cm/sec and higher the ice growth rate {ν} is found proportional to the 3 2 power of the applied subcooling ΔT and to the 1 2 power of the flow velocity V. These results are substantiated by a model which assumes the growth rate is determined solely by the rate at which the heat of solidification is transferred by convection to the flowing water. Boundary layer calculations at the stagnation region of the ice platelet give v as a function of ΔT, V and the radius of curvature R at the ice-platelet edge. Maximization of {ν} with respect to R yields the growth law: ν = aV 1 2 ΔT 3 2 From the experimental values of a the ice-water interfacial tension is calculated as 31.8 ergs/cm 2. No evidence of kinetic control was found, even at the highest water velocities.
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