“…As a result, some of the parameters of the model need to be carefully tuned, in order 1 Similarly, Bøe [2] and Taitel [19] derived, from force balance equations expressed on the body of one slug, conditions on the superficial velocities of gas and liquid to predict whether a given system will experience slugging or not. Much later, these criteria were proved to correspond to a Hopf bifurcation by Zakarian [20], who analyzed a simpler DAE model and showed that, when varying certain parameters, the stability properties of the system switch at a certain critical (bifurcation) point. 2 Unfortunately, they fail to predict the instability of some systems (e.g.…”