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Slug flow and its transitions in large-diameter horizontal pipes. (English) Zbl 1144.76402
Summary: A flow regime map is compiled for the air/water two-phase flow in the Harwell 30 cm dia horizontal pipeline. The transitions differ substantially from those for small-diameter pipes and are not predicted accurately by any theoretical model. Data on slug frequency, length, holdup, translational velocity and pressure gradient are presented and compared with existing data. The results show that the pipe diameter has a large effect on all these properties. Several changes in the distribution of the phases in large-diameter pipes are reported. These are especially prominent in slug and annular flow.
76Txx Multiphase and multicomponent flows
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