Abstract
A series of experiments on subcooled pool boiling on a thin wire are carried out. We focus on the condensation and collapse processes of vapor bubbles generated on the heated wire. We find two major patterns of the vapor bubble behaviors resulting in the emission of the microbubble around the thin wire by employing high-speed observation with frame rate up to 150,000 fps. Effect of the surface roughness of the wire on the vapor bubble behavior and heat transfer coefficient is discussed.
