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Naval Architecture

Services - Performance


Computational Fluid Dynamics

Hull and Appendages CFD stands for Computational Fluid Dynamics and is a method to simulate the (water) flow around a hull or its appendages, such as keel, rudder or daggerboard. The yacht and the surrounding water is modelled by small elements on the surface, so called panels. As in towing tank tests, the result of the CFD calculation is a prognosis of the lift and drag (resistance), as well as the momentums and the centres of effort.
These data are transferred into so-called VPPs (Velocity-Prediction-Programs), where the calculation of the yachts equilibrium and its speed is made. Compared to towing tank tests, CFD is much faster and less expensive, however the handling of this tool and the interpretation of the results need some experience.