EXPERIMENTS ON EXTREME WAVE GENERATION BASED ON SOLITON

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 s. NLS Conclusions

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

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

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

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

EXPERIMENTAL CASES EXPERIMENTS A: DEPTH H 0 = 3. 55 m, various EXPERIMENTS B: DEPTH H 0 = 3. 55 m, various EXPERIMENTS C: DEPTH H 0=3. 55 m, various Main Characteristics CASES TO BE PRESENTED C 2 M 2 C 2 M 0

Overview of Experimental Test Set-Up

C 2 M 2 Prediction of focus point: 150 m from the wave maker 10 m 40 m 100 m

C 2 M 2 Prediction of focus point: 150 m from the wave maker 10 m 150 m 160 m

C 2 M 2 150 m In between 2 peaks: 11 waves 160 m

150 m 160 m

ANALYSIS With HUBRIS/s. NLS

ANALYSIS With HUBRIS

ANALYSIS With HUBRIS/s. NLS

ANALYSIS With HUBRIS

ANALYSIS With HUBRIS/s. NLS

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 s. NLS partly predicts the evolution of the SFB soliton