EXPERIMENTS ON EXTREME WAVE GENERATION BASED ON SOLITON ON FINITE BACKGROUND René Huijsmans(MARIN) Gert Klopman (AFR) Natanael Karjanto,Brenny van Groesen (U Twente) Aan Andonowatti (ITB)

OUTLINE Introduction Soliton on finite Background Results of Experiments Analysis with 2-D non-linear potential code and sNLS Conclusions

Spatial NLS equation Free-surface elevation with: Spatial NLS equation: Where and are the carrier wave number and frequency

Spatial NLS coefficients: with and and are the bound long-wave amplitude coefficients

SOLITON ON FINITE BACKGROUND (SBF) as a solution of (spatial) NLS Physics of SFB van Groesen, A, N. Karyanto Amplitude amplification 1 3 Phase singularity t Parameters of SBF + cc

typical wave tank, 250m long 0 L LARGE AMPLITUDE A snapshot of wave elevation under Maximum Temporal Amplitude (MTA) curve Location of wave maker MTA

EXPERIMENTS A: DEPTH H0 = 3.55m, various EXPERIMENTS B: DEPTH H0 = 3.55m, various EXPERIMENTAL CASES C2M0C2M2 EXPERIMENTS C: DEPTH H0=3.55m, various Main Characteristics CASES TO BE PRESENTED

Overview of Experimental Test Set-Up

10m 40m C2M2 100m Prediction of focus point: 150m from the wave maker

10m 150m C2M2 160m Prediction of focus point: 150m from the wave maker

160m 150m In between 2 peaks: 11 waves C2M2

150m 160m 150m

ANALYSIS With HUBRIS/sNLS

ANALYSIS With HUBRIS

ANALYSIS With HUBRIS/sNLS

ANALYSIS With HUBRIS

ANALYSIS With HUBRIS/sNLS

ANALYSIS With HUBRIS

Conclusions MTA approach good basis for predicting Focus point Phase singularity clearly present at one side of the wave group Non-linear potential flow code and sNLS partly predicts the evolution of the SFB soliton