Abstract
This paper investigates a heterogeneous nucleation of supercooled water on foreign particles. The ultra pure water in an acrylic tank is cooled by the upper side heat transfer disk and freezing temperatures are measured where the particle concentration is varied. The property of the particles is explained by a surface parameter. It is assumed that the supercooled water will freeze when the number of nuclei in the supercooled water reaches 1. Freezing temperatures are calculated using the surface parameters and the experimental results are compared with the calculated results. The freezing temperatures rise as the particle concentration is higher. The model of nucleation by aggregation of foreign particles is proposed and the reason for the rising of freezing temperatures is showed.
