Computational Fluid dynamics

Computational Fluid Dynamics

In the field of naval design, Computational Fluid Dynamics (CFD) has significantly reduced the need for tank testing, but it cannot replace experimental testing. CFD, applied to the field of boating, involves solving equations that describe the behavior of fluids (liquids, gases, and multiphase) and their interaction with vessels. Since 2018, Ranieri Cantieri Nautici has started utilizing CFD techniques through a technical partnership with the Fluid Dynamics Laboratory at the University of Calabria. In particular, Professor Giancarlo Alfonsi, Ph.D., and Engineer Agostino Lauria, Ph.D., who are responsible for the Fluid Dynamics Laboratory, constantly monitor the activities related to optimizing the hydrodynamic resistance of vessels produced by Ranieri Cantieri Nautici.

The analyses conducted on Ranieri Cantieri Nautici’s vessels initially focused on phenomena occurring in parts of the system that are difficult to experimentally test. Subsequently, the overall behavior of the vessels was analyzed, followed by the optimization of hull shapes, with a focus on stability, navigation quality, and reduction of hull resistance. Hull optimization involves parameterizing the three-dimensional geometry (Figures 1-4), and after a certain number of optimization cycles, the best hull design is identified, characterized by the lowest resistance.

Characterization of Ranieri Cantieri Nautici’s vessels encompasses both the submerged and emerged parts. Simulations are conducted within a computational domain that can replicate various sea and wind conditions. The codes used are generally in-house, developed in the Fluid Dynamics Laboratory, and based on the C++ OpenFOAMĀ® library.

The use of these technologies ensures Ranieri Cantieri Nautici’s customers achieve the highest level of efficiency, safety, and performance, combining nearly 50 years of know-how in boat construction with cutting-edge technologies.

Representation of the three-dimensional geometry of the boat called MITO500

Representation of the three-dimensional geometry of the boat called MITO500.

Representation of the three-dimensional geometry of the boat called MITO500

Representation of the three-dimensional geometry of the boat called MITO500

Representation of the three-dimensional geometry of the boat called MITO500

Representation of the three-dimensional geometry of the boat called MITO500

Representation of the three-dimensional geometry of the boat called MITO500

Here are some visualizations of the numerical results obtained using a Reynolds-Averaged Navier-Stokes (RANS) approach on the boat called MITO500.

Here are some visualizations of the numerical results obtained using a Reynolds-Averaged Navier-Stokes (RANS) approach on the boat called MITO500.

Here are some visualizations of the numerical results obtained using a Reynolds-Averaged Navier-Stokes (RANS) approach on the boat called MITO500.

Here are some visualizations of the numerical results obtained using a Reynolds-Averaged Navier-Stokes (RANS) approach on the boat called MITO500.