Spaceship designs11/15/2023 ![]() This quickly gave us a good picture of the potential improvements.” Our suggestions were delivered in the form of a report. These provide far more insight than standard analysis tools. Bas: “we used our own tools to analyse the performance of the code. VORtech employees Bas van ‘t Hof and Werner Kramer did a fairly complete study of the current performance and the bottlenecks in just a few weeks. Performance studyįortunately, after a first analysis, we did find room for improvement. So, in this case it was a challenge to come up with further improvements. But ReFRESCO was already optimized by very capable people. Often, VORtech guarantees a speedup by at least a factor of two without ever having seen the code we almost always find optimization potential in a computational code. VORtechs knowledge and experience have shown to be very helpful to speed up ReFRESCO. The fact that new functionality is constantly added doesn’t help either, sometimes also reducing the effectiveness of the parallelisation. ![]() Even so, there is a constant need for additional speedup. Therefore, the code has been parallelised and is mostly run on a serious computational cluster. Obviously, these models lead to very long computing times. In short: it models all the processes that occur around a ship and its propulsion. ReFRESCO is a multiphase code: it not only computes the water flow but also models the bubbles in the flow. The code is based on the Navier-Stokes equations with many additional equations for things like turbulence. In essence, it calculates the ship’s movement in complex flow situations. It is central to many of the simulations that are needed to design a ship. One of the most important software packages is ReFRESCO. Less visible, but certainly as important, is the software that Marin develops and uses. The most striking are probably the basins, where scale models of ships and offshore structures can be tested. Its research facilities and tools are well known both in the Netherlands and abroad. It aims to make ships cleaner, faster and safer. Marin is a globally acknowledged top institute for hydrodynamic and nautical research.
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