“…Walmet and Staub 110 studied local subcooled boiling, characterized by important nonequilibrium effects, with the help of several local measurements of pressure, void fraction, and temperature. For temperature measurement, they used a copper-constantan thermocouple, the size of which was rather large: 150 x 200 M. m. The measured temperature T mes was related to the average liquid temperature T^ by the relationship (1) where Tsat is the vapor temperature assumed to be in saturated conditions and R the line void fraction measured with an X-ray absorption method.…”