Slug Self-Propulsion in a Capillary Tube Mathematical Modeling and Numerical Simulation

Figure 13

Slug velocity versus viscosity [mPas] in logarithmic scale; numerical result, approximated by , is graphed in solid line; experimental result extracted from earlier work approximated by is in dotted line. The radius of the capillary tube is [mm], and the successive lengths are [mm] and [mm]; also, the viscosity [mPas] is kept constant.