Visualization System for Viscous Fluid Movement in High-pressure Vessel

概要

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Oil outflows from sunken ships, e.g., the Nakhodka and Chikubu-maru, have been reported in recent years. The purposes of this study were observation of C heavy oil gushing out behavior in freshwater and seawater at atmospheric pressure and construction of its visualization system in a high-pressure vessel which can pressurize water up to 40 MPa. One motion of C heavy oil gushing out was continuously belt-like, and the other motion was intermittently spherical. Outflows in seawater were bigger than those in freshwater. The visualization system for viscous fluid gushing out behaivior consisted of a color CCD camera, LED, and stepping motor. The system successfully recorded intermittent spherical gushing in the vessel. The oil from a sunken ship would not cause a big outflow unless the sunken body sustained a large shock or earthquake.