Скачать или смотреть Creating ice crystals homogeneously

A video demonstration of creating ice crystals homogeneously; note: the fine details in this video are best watched in full screen HD. Water droplets are inserted into a chest freezer which rapidly become supercooled (their temperature is less than 0°C but they remain liquid and unfrozen). A small volume of compressed air is rapidly expanded which cools a local environment to below about -36°C. This forces the formation of ice crystals which then grow at the expense of the supercooled water droplets. The ice crystals toward the end of the video are the small, glistening specks of light. Recorded at The University of Manchester, England.