Bubble Rise in Glassmelts

Bubble-rise experiments in borate glassmelts were conducted in a transparent furnace at T=800° to 1000°C using video techniques to record and analyze the bubble rise. The results of these experiments over a range of Reynolds numbers from 10 −7 to 10° clearly indicate that the bubble motion is governed by the Rybezynski-Hadamard equation and hence that the glassmelts are not subject to interfacial contamination.