A CFD Study for Multi-Directional Focused Extreme Wave

The problem of wave-in-deck loading involves very complex physics and demands intensive study. In the Computational Fluid Mechanics (CFD) approach, two critical issues must be addressed, namely the ecient, realistic numerical wave maker and the accurate free surface capturing methodology. Most reported CFD research on wave-in-deck loads consider regular waves only, for instance the Stokes 5th-order waves. They are, however, recognized by designers as approximate approaches since “real world” sea states consist of random irregular waves. In our work, we report a recently developed focused extreme wave maker based on the 3D spreading focused NewWave theory. This model can better approximate the “real world” conditions, and is more ecient than conventional random wave makers. It is able to eciently generate targeted focused waves at a prescribed time and location. The work is implemented and integrated with OpenFOAM, an open source platform that receives more and more attention in a wide range of industrial applications. The free surface capturing is achieved by an improved, extensively validated Volume of Fluid (VOF) method.