Methods and apparatus for mixing fluids

摘要

A bubble cap ( 400 ) has a cap ( 430 ) with at least one slot ( 495 ) and a riser ( 420 ), configured with a skirt height ( 460 ) of at least 4 cm, such that 1.5*Skirt Height (cm)+[Slot Length (cm)-Exposed Slot Height (cm)] is greater than or equal to 7.5, and posed such that a liquid fluid and a gas flow co-currently upwardly in a space between the riser ( 420 ) and the cap ( 430 ).