231675.fig.004a
(a)
231675.fig.004b
(b)
Figure 4: Snapping slug formation ( 𝑈 𝐺 = 0 . 1 5 8  m/s ; 𝑈 𝐿 = 0 . 0 4 2  m/s). (a) experimental results [6]; (b) Numerical simulation.