Selective Laser Heating of Closed Cavity Shells Filled with Liquid

A method for selective heating of a cavity shell filled with liquid using heated submerged jets generated by laser heating of a liquid at the end of an optical fiber introduced into the cavity is investigated. It is experimentally shown that the jets, passing through the “cold” surrounding liquid, collide with the shell and heat it, while the temperature of the surrounding liquid rises insignificantly. Numerical simulation of this process allows us to estimate the heating time of closed shells to the temperature of thermal modification of the walls of pathological objects and sanitation of surfaces depending on the power of laser radiation. It is important to consider the obtained result during laser-induced precision cleaning and sanitation of surfaces in closed volumes when developing medical technologies for laser surgical treatment of pathologically altered vessels, cysts, and other applications.