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Simulation-based design increasingly replaces traditional experience-based design. This article gives an overview of techniques now used in advanced industry practice, with particular focus on navy applications. The article covers the basics of the techniques, illustrating approaches and state of the art with applications taken from the experience...
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Context 1
... (by two orders of magnitude) at a negligible penalty in accuracy (about 1%). The procedure has been extensively validated for rudder flows both with and with- out propeller modelling. The same approach for propeller and rudder interaction can be applied for podded drives, Junglewitz and El . Comet allows also the treatment of cavitating flows, Fig.8 (see page 12). The extensive experience gathered in the last 5 years has resulted in a GL guideline for rudder design procedures, GL (2005), El Moctar (2007. ...
Context 2
... models are suitable for examining more complex, time-dependent scenarios involving multiple compartments and levels, but numerical stability can be a problem for scenarios involving multi- level ship domains, HVAC systems and for post- flashover conditions. CFD models can yield detailed information about temperatures, heat fluxes, and species concentrations, Fig.10. However, the time penalty of this approach currently makes CFD unfeasible for long periods of real time or for large computational domains. ...
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... simulations are very fast, allowing typically 500 simulations within one hour, to gain a broad basis for statistical evaluation. The ship is represented by a simplified grid of different cell types (accessible floor, doors, stairs, obstacles/walls), Fig.11. Passengers and crew are represented by intelligent agents. ...
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