Solution-adapted grid applied to RANS calculations of ship flow.
A solution-adaptive grid fully integrated into the fluid solver.
The multihull Groupama 3 was forced to withdraw from the Jules Verne Trophy (yacht race) held between Brazil and Africa in November 2009. During this time, it became clear that a comprehensive study of the slamming phenomenon affecting the hull's bottom under unexpected navigation conditions was necessary. A study in South Africa confirmed that structural damage, even when underestimated, is caused by slamming stresses occurring at the rear of the hull in the windward direction. This condition is observed when a multihull takes off from the water at speeds of 30 to 40 knots in swells and then lands. The latest version of the FINE/Marine software, developed by CNRS at École Centrale Nantes and the NUMECA sales team in Japan, allows for accurate simulation of such problems. By using a solution-adaptive grid algorithm, it enables precise modeling of the effects of the water surface on the hull and the calculation of the resulting pressure fields. These tools assist designers in reinforcing the hull's structure.
basic information
This paper introduces the details of the adaptive grid and its application to the trimaran Groupama 3 in order to examine the effects of a hull moving at a certain angle relative to the sea surface.
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