The “slug capturing” method developed by Issa & co-workers is based on the numericalsolution of the two-fluid model equations using fine meshes (unlike existing methodsemploying much coarser ones) to enable the resolution of inherent flow instabilities thatwould otherwise be averaged out. The method had been extensively validated in the pastagainst laboratory experimental data for hydrodynamic slugging. Here, more validationsare presented both for hydrodynamic and severe slugging and the results are comparedagainst independent experimental measurements. It is then applied to a real 20 inchdiameter, 15 km long oil and gas pipeline operating at a pressure of 96 bar to simulate theinitiation of hydrodynamic waves/slugs and their complex interaction with terrainundulations in the pipeline.
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