Two-phase mixture level swell in vertical pipes

Abstract

The behavior of the two-phase mixture level was examined in the case of bubbling of a stagnant liquid column in vertical pipes and also in the case of bubbling of a liquid column to which liquid is supplied as a falling film. In a range of low air flow rates where the flow pattern is of bubbly type, the mixture level swell and its fluctuation amplitude were small. However, these values increased sharply as the air flow rate was increased and the flow pattern turned into a slug type. The mean height of the two-phase mixture level and the level fluctuation amplitude were analyzed physically and compared with the experimental results.