Characterisation of bubbles formed in a cylindrical T-shaped junction device

In this work, a train of confined bubbles inside a millimetric cylindrical T-junction device is studied. Calibrated bubbles need to be known precisely for multiphase phase flow applications. Experimental results of bubble formation and transport processes will be presented and discussed. For a liquid-gas flow, we will demonstrate how the wetting behaviour plays a significant role on the formation and motion of the bubble.

► Normalized bubble lengths depend on the wetting proprieties. ► A model of bubble frequencies for wetting liquid is proposed. ► Bubble pattern diagrams are deduced and compared to the literature. ► Bubble motion measurements are compared to different models. ► Dimensionless numbers allow to transpose the studied mechanisms at lower scales.