Abstract
The behavior of rewetting on high superheated surface, focusing on an effect of liquid subcooling on wetted area and a contact angle during collapse of film boiling was investigated experimentally. In the experiments, a liquid jet from a nozzle was supplied on the superheated surface, made of a platinum wire, in the stable subcooled film boiling of ΔT_<sub> = 15K, and then the wetted area was observed. The experimental results showed that the propagative collapse of the vapor film occurred when the local wall temperature was below 450℃. The measured angles between the liquid-vapor interfacial line and the heated wall corresponded to dynamic contact angle were close to the dynamic advancing contact-angles in room temperature even if the liquid is subcooled.
