Animation shows an animation of periodic ship oscillation solved using the volume fraction method.

Steady state simulation of waves around a cargo ship. EnSight's keyframe animation capability allows the user a guided tour of the results. EnSight's texture map feature for the sky and branding of the ship adds contextual information.

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Virtual Reality Immersive Visualization of CFD Results
The EnSight image shows the dispersion of a toxic and flammable gas mixture (H2S and hydrocarbons) released by an off-shore production platform. The numerical values are compared with the Federal OSHA international safety standards.  Image courtesy of CETMA – www.cetma.it.

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by Douglas Clark

Oil spills and man made pollutants leap to mind at the mention of endangered sea life and toppled ecosystems, but unknown to most laypeople, an everyday event in the world of maritime transport is actually among the most significant threats to marine ecology today. Without any of the widespread attention given to a toxic spill, cargo ships and other vessels move from port to port around the world and often quietly introduce non-indigenous species that can wreak havoc in their new habitats. Wesley Wilson, an engineer with the Computational Fluid Dynamics group at the Naval Surface Warfare Center, Carderock Division, in Bethesda, MD, and his colleagues are conducting research that may one day help ocean freighters and other ships to dramatically curb the spread of non-indigenous species.

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Animation of a motor yacht in head waves, solved using Comet, the CFD solver from CDadapco. Flow equations and rigid body motion equations were solved to account for dynamic trim and sinkage. Image on the bottom right shows the yacht hull colored by pressure distribution.

Animation courtesy of Michael Palm, Voith Turbo Schneider Propulsion GmbH & Co. KG, www.voithturbo.com/marine.

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Animation is showing Liquid Natural Gas emanating from a hole in a breached tanker shell.  The Liquid Natural Gas evaporates upon contact with the sea-water and ignites when it hits the atmosphere, presumably from a spark.  Simulation courtesy of ANSYS-Fluent, post-processed in EnSight.

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