Nowadays, it is primarily so-called CFD calculations that are mostly associated with fluid mechanical simulations. A usually more direct method is the construction of a true-to-scale model and a scale-up of the obtained results. These pieces of data can then be consulted in order to validate CFD calculations. Only in this manner can definitive results be obtained.
INVENT operates a fully-equipped fluid mechanical laboratory complete with test tanks in all imaginable sizes. Here, "State of Research" CFD programs with respective computing power are available in addition to the most modern and up-to-date fluid measuring techniques.