title: The effect of ultrasonic waves on the nucleation of pure water and degassed water.
abstract: In order to clarify the mechanism of nucleation of ice induced by ultrasound, ultrasonic waves have been applied to supercooled pure water and degassed water, respectively. For each experiment, water sample is cooled at a constant cooling rate of 0.15 °C/min and the ultrasonic waves are applied from the water temperature of 0 °C until the water in a sample vessel nucleates. This nucleation temperature is measured. The use of ultrasound increased the nucleation temperature of both degassed water and pure water. However, the undercooling temperature for pure water to nucleate is less than that of degassed water. It is concluded that cavitation and fluctuations of density, energy and temperature induced by ultrasound are factors that affect the nucleation of water. Cavitation is a major factor for sonocrystallisation of ice.
authors.affiliation: University of Shanghai for Science and Technology, Shanghai 200093, China.
authors.forename: Deyang
authors.initials: D
authors.lastname: Yu
authors.forename: Baolin
authors.initials: B
authors.lastname: Liu
authors.forename: Bochun
authors.initials: B
authors.lastname: Wang
mesh_terms: D003460:Crystallization / Q000379:methods; D005740:Gases / Q000737:chemistry* / Q000528:radiation effects*; D019220:High-Energy Shock Waves; D007053:Ice / Q000032:analysis*; D011829:Radiation Dosage; D013010:Sonication / Q000379:methods*; D014867:Water / Q000737:chemistry*
chemical_list: D005740:Gases; D007053:Ice; D014867:Water