An Acoustic Technique for the Analysis of Thermal Processes

Abstract

A technique for experimental investigation of thermal processes in liquid media, which is based on putting the thermal source into contact with a solid rod, sounding the rod with a set of acoustic waves, and measuring the velocities of these waves under changing temperature, has been developed. The technique has been tested using the phase transition of the first order (evaporation of microdrops of a liquid) as an example. It has been shown that the technique makes it possible to measure temperature, time, velocity, heat of evaporation, and mass of the liquid sample. After an appropriate calibration, the technique is also applicable to determining the thermal conductivity of solid materials.