@Article{fhmt.2026.074926,
AUTHOR = {Artem N. Kotov, Aleksandr A. Starostin, Aleksandr L. Gurashkin},
TITLE = {Advanced Methods for Investigating the Superheated State of Liquids Based on the Pump–Probe Principle},
JOURNAL = {Frontiers in Heat and Mass Transfer},
VOLUME = {},
YEAR = {},
NUMBER = {},
PAGES = {{pages}},
URL = {http://www.techscience.com/fhmt/online/detail/26013},
ISSN = {2151-8629},
ABSTRACT = {Dynamic methods for creating a superheated state of liquids and tracking their decay are presented. These methods allow relaxation characteristics of short-lived metastable states to be investigated across a wide range of temperatures and pressures. The relaxation of a medium is studied by a “probe” action after a short “pump” pulse. The concentration of the pump pulse in time and space allows the synchronization and localization of means for recording fast-flowing processes. Our aim was to carry out a brief review of methods for studying pulsed thermal processes in a superheated liquid based on the pump–probe principle by heating a platinum wire and releasing pressure in a bubble chamber. Although this article is a review in nature, we present new results obtained using the methods described. Non-stationary heat transfer to <i>n</i>-hexane with a water admixture was studied using the method of controlled two-pulse heating of a thin platinum wire. A water admixture of less than 0.01% increases the heat transfer of the probe by 10% at a sufficiently high degree of superheating of the base fluid. For uniformly superheated <i>n</i>-pentane, the dependencies of the refractive index and density on pressure and temperature were obtained using fiber optic densitometry. Using laser velocimetry, vaporization rates ranging from 4.8 to 9.5 m/s were obtained in the first microseconds of <i>n</i>-pentane boiling-up due to activation by a laser pulse in a bubble chamber at relatively low superheating (18–44 K).},
DOI = {10.32604/fhmt.2026.074926}
}