Abstract
Measurements are described of the profile of solid fraction in the mushy layer that is formed when aqueous solutions of sodium nitrate are cooled and crystallized from below. The method relies on the measurement of electrical resistance in a conductivity cell, one electrode of which is a thin horizontal wire situated in the mushy layer. As the solid fraction increases with time, it insulates an increasing fraction of the length of the wire and increases the resistance. The results show an encouraging degree of consistency with the theoretical predictions of Worster. Inclusion in the theory of the effects due ti the difference in density between the solid and liquid phases may enhance the agreement between the theoretical and experimental results even further.
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