Fundamental study on entrainment properties of round bubble plumes in linearly stratified environments

Abstract

Laboratory experiments were performed to study entrainment properties of round bubble plumes in linearly stratified environments. It is shown that stratified ambients decrease the liquid volume flux of bubble plumes, compared with the homogeneous, and an empirical foimula of the volume flux was derived. With fitting between this formula and numerical analysis of one dimensional model, entrainment coefficient was estimated, and an empirical foimula of entrainment coefficient in stratified environments was obtained in the form of adjustment from that in the homogeneous.