V. Dehenau et Gd. Raithby, A STUDY OF TERRAIN-INDUCED SLUGGING IN 2-PHASE FLOW PIPELINES, International journal of multiphase flow, 21(3), 1995, pp. 365-379
The presence of gas and liquid flowing simultaneously in pipelines mad
e of several uphill and downhill sections can lead to the formation of
long liquid slugs which are blown from one pipeline section to the ne
xt due to gas pressure. This terrain-induced slugging gives rise to un
desirable unsteady flow conditions. In this paper, a transient two-flu
id model is validated for conditions of terrain-induced slugging. This
model contains new correlations, for the drag coefficient and the vir
tual mass force for the slug flow regime, that were presented in previ
ous papers. An experimental study of terrain-induced slugging in a lab
oratory scale pipeline, made of two uphill and two downhill sections,
is also reported. This provides data for the model validation. The mod
el predicts all the major features of the data, and is in good quantit
ative agreement as well.