Drift-flux parameters of heterogeneous bubbly flows in air–water cylindrical bubble column

Abstract

An experimental database of the total gas holdup, ${\alpha }_G$, of heterogeneous bubbly flows in air–water bubble columns was constructed from the literature data (612 points). Ranges of the superficial gas velocity, $J_G$, the initial liquid height, $H_0$, and the column diameter, $D_H$, were $0.003\le J_G\le 0.40\mathrm{m/s}$, $400\le H_0\le 6600\mathrm{mm}$ and $200\le D_H\le 3000\mathrm{mm}$, respectively. The dependencies of the drift-flux model’s parameters, i.e., the distribution parameter, $C_0$, and the drift velocity, $V_{GJ}$, on $H_0$ were investigated based on the ${\alpha }_G$ database and were introduced into the ${\alpha }_G$ correlation. The present correlation in terms of the Froude number using $H_0$ as the characteristic length gives good evaluations for the ${\alpha }_G$ database.