Cinematographic Study of Ice Crystal Formation in Water

Abstract

Experimental work was conducted in the cold chamber laboratory of the Institute of Low Temperature Science, Hokkaido University.Applying shadow photograph method, the authors devised a cinematographic method, which for examining ice crystal formation in the water.By seeding with minute ice crystals on a water surface slightly supercooled, tiny ice-discs in the early stage were produced; according to the surrounding conditions they deformed to various type.The relation between the ice crystal form and the water temperature in supercooling was studied.In this experiment, a number of powdered materials as silver iodide, kaolin, carbon, and clay particles were found to be not active for nucleus of ice crystal directly, but minute ice crystals and splinters were active. 1. Introduction