A Breakup Mechanism of High-Temperature Melt Jets : (Observation in a Molten Tin Jet)

Abstract

In order to clarify a breakup mechanism of high-temperature melt jets, a series of experiments was carried out by using a molten tin jet (13 mm in diameter) with initial temperatures from250°C to 950°C. The evolution of large-scale structures, which is caused by organized motion between jet and surrounding fluid, was clearly observed. Local swelling and cavity formation, collapse after swelling, and breakup with ejection and swelling were confirmed in jets with low, middle and high initial temperatures, respectively. These phenomena show that breakup is caused when a high pressure is produced by the fluid entrained inside the jet with enough termal energy due to organized motion.