Second-order random wave modeling in space and time, with comparison to experiments
- Norwegian Marine Technology Research Inst. A/S, Trondheim (Norway)
Experimental wave elevation records from an array of wave probes in an irregular, longcrested laboratory wave field are compared to estimates from a second-order numerical wave model. The spatial dispersion of large and steep random individual waves is emphasized. For the numerical wave model, which is based on a linear (free) component to which a bound second-order non-linear component is added, linear dispersion is applied on the free components. The non-linear part propagates bound to this. The results from the comparison show that over a range corresponding to about 100m full scale, the model works well for moderately steep waves. For the most extreme and steep waves, some deviation is observed, although the main non-linear spatial development properties are reasonably well predicted. Thus the measured non-linear component seems to be partly coupled to the extreme crest phase velocity, while the numerical second-order component is more connected to the group velocity of the whole wave group. A non-linear wave dispersion model may be needed for improved prediction of extreme wave propagation.
- OSTI ID:
- 182683
- Report Number(s):
- CONF-950695-; ISBN 0-7918-1306-1; TRN: IM9608%%48
- Resource Relation:
- Conference: International conference on offshore mechanics and arctic engineering, Copenhagen (Denmark), 18-22 Jun 1995; Other Information: PBD: 1995; Related Information: Is Part Of OMAE 1995 -- Proceedings of the 14. international conference on offshore mechanics and arctic engineering. Volume 1, Part A: Offshore technology; Chakrabarti, S.K. [ed.] [Chicago Bridge and Iron Technical Services, Plainfield, IL (United States)]; Myrhaug, D. [ed.] [Norwegian Inst. of Tech., Trondheim (Norway)]; Ertekin, R.C. [ed.] [Univ. of Hawaii, Honolulu, HI (United States)]; Maeda, Hisaaki [ed.] [Univ. of Tokyo (Japan)]; Wang, H.T. [ed.] [Naval Research Lab., Washington, DC (United States)]; PB: 523 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental investigation of non-linear irregular wave kinematics
Fast and local non-linear evolution of steep wave-groups on deep water: A comparison of approximate models to fully non-linear simulations