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Numerical Simulation of the Three-Phase Flow Formed within the Riser Tube of a System Designed to Remove Leaking Oil from Maritime Accidents


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DOI: https://doi.org/10.15866/ireme.v8i1.1247

Abstract


Maritime accidents that can lead to major environmental pollution occur regularly.  A simple system based on the fact that oil does not dissolve and is of lower density than sea-water, is proposed. The leaking oil is collected by a dome and it relies on gravity to channel the flux of oil along with sea-water, through a long riser tube to the sea surface, forming a two-phase buoyancy driven flow. A parametric axisymmetric CFD study is carried out in order to examine the solution of injecting air in the two-phase buoyancy driven oil-water flow, to avoid the formation of regions with single-phase flow of oil that can lead to flow blockages in the riser tube of the system. The present analysis studies the dome and the first 20 m of the riser tube. Computed distributions of flow regimes developed as well as radial mixtures velocities and flow pattern maps for the studied cases are presented
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Keywords


Maritime Accident; Leaking Oil; Numerical Simulation; Dome; Riser Tube; Three–Phase Flow

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References


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