Fig. 7: Free surfaces for two-phase flow in three flow scenarios.

a Free surface at a mixing flow rate of 5.2 ml/s and a gas flow rate of 0.51 ml/s, b free surface at a mixing flow rate of 5.2 ml/s and a gas flow rate of 0.62 ml/s, c free surface at a mixing flow rate of 6.3 ml/s and a gas flow rate of 0.62 ml/s.