Visualization of physical processes occurring on liquid nitrogen injection into water

Hydrodynamic processes occurring when cryogenic liquid is injected into water are experimentally investigated. Processes accompanying the phase transitions under these conditions were recorded. Optical recording of the processes revealed their structure and stages. It is shown that at the outer boundary of a cylindrical vapor bulb, active turbulent mixing is observed, which should be taken into account when one will develop a mathematical model of the process. At the gas–water interface, ice crystal structures were observed. The obtained results may be useful for studying a new method of gas hydrate production based on the shock-wave technique.