Investigation of the kinetics of spontaneous boiling-up of superheated n-pentane in a glass tube with defects of the inner surface. II. Evaporation front

Abstract

An experimental study of the kinetics and dynamics of spontaneous boiling-up of superheated n-pentane in a thermostated glass tube was carried out using high-speed video recording. The boiling-up occurred both at steady atmospheric pressure (in the temperature range from 100.3 to 125.3 °C) and during pressure reduction (from 105.3 to 135.3 °C). The top of the tube is sealed. The linear propagation velocity of an evaporation front of a superheated liquid has been calculated from the video frames. It has been shown that this value lies in the range from 0.30 to 2.23 m/s, increases with the depth of entry into the metastable region, and depends on the configuration of the liquid-vapor interface.