Two-phase Mixture Level Swell in Vertical Pipes.

Abstract

This study examines the behavior of a two-phase mixture level in the case of bubbling of a stagnant liquid column in vertical pipes and also in the case of bubbling of the liquid column to which liquid is supplied as a falling film. In a range of low air flow rates where the flow state is a bubbly type, the mixture level swell and its fluctuation amplitude are small; however, these values increase sharply as the air flow rate increases and the flow state turns to a slug type. The mean height of the two-phase mixture level and the level amplitude are physically analysed and compared with the experimental results.