D. Stassinopoulos et al., PERIODIC STATES IN INTERMITTENT PIPE FLOWS - EXPERIMENT AND MODEL, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 50(2), 1994, pp. 1189-1193
We report an experimental study of a transition to periodic intermitte
ncy in pressure-driven pipe flows. The transition is preceded by a rap
id increase of the intermittency factor with pressure. To model interm
ittent pressure-driven flows, we introduce a general model, where a fi
fth-order Ginzburg-Landau equation is coupled with a pressure-velocity
relation that takes into account the frictional effect of the turbule
nce on the flow velocity. We determine the phase diagram and show that
the model gives a qualitative understanding of the transition to peri
odic intermittency.