2002 Volume 88 Issue 6 Pages 292-299
Water model experiments have been carried out on the Coanda effect in air-water two-phase flows. It is however not clear whether the results are applicable to gas-molten metal two-phase flows. The objective of this study is to investigate the characteristics of bubbling jets subjected to the Coanda effect in a mercury bath. Two types of Coanda effects were treated. One is the attachment of a single bubbling jet to the side wall of a vessel. The other is the coalescence of two bubbling jets. Gas hold-up was measured with a two-needle electro-resistivity probe to determine the attachment length and the coalescence length measured from the nozzle exit. Empirical equations were proposed for the two lengths.