Dove e quando

CFD, UQ, AI, viz. Sex, Lies and Videotapes in Ocean Engineering

Prof. Stefano Brizzolara
Virginia Tech, USA

Abstract
Computational Fluid Dynamics (CFD) is causing a revolution in ship design, taking over traditional methods based on experimental tests in model scale and facilitating innovation by cheaper and faster simulations on virtual prototypes. CFD is sexy: its attraction derives from the ability to simulate very complex physics and to provide virtually unlimited amount of data. Uncertainty Quantification (UQ) studies should closely follow the rapid expansion of CFD based design, but unfortunately this is not often the case: few studies are published and often the methodology used is incomplete or flawed. Standard UQ studies often lead to false conclusions (i.e. lies). Artificial intelligence, (AI), first invented to process digital image content, offers unique capabilities of complex data analysis and reduction. Specialized AI algorithms applied to the interpretation of scientific data have merely started to unveil their enormous potentials, when used in conjunction with numerical models or computer aided multi-disciplinary, multi-objective design frameworks. Following the dynamic of the Cannes Palm d’Or movie winner, “Sex, Lies and Videotapes” the talk will discuss the intimate relationships between CFD (sex), UQ (lies) and AI (videotapes) in ocean engineering. Examples of new CFD methods, recently developed at i-Ship lab, will be presented in conjunction with problematics found in the application of different UQ methodologies for their verification and validation. Finally, we will show potentials and interesting synergies offered by new AI-based techniques, specifically developed to enable simulation based design or to improve numerical models in CFD solvers.

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