Extreme Wave Simulation with Iterative Adaptive Approach in Numerical Wave Flume

Extreme wave is highly nonlinear and may occur due to diverse reasons unexpectedly. The simulated results of extreme wave based on wave focusing, which were generated using high order spectrum method, are presented. The influences of the steepness, frequency bandwidth as well as frequency spectrum on focusing position shift were examined, showing that they can affect the wave focusing significantly. Hence, controlled accurate generation of extreme wave at a predefined position in wave flume is a difficult but important task. In this paper, an iterative adaptive approach is applied using linear dispersion theory to optimize the control signal of the wavemaker. The performance of the proposed approach is numerically investigated for a wide variety of scenarios. The results demonstrate that this approach can reproduce accurate wave focusing effectively.