WAVE GROUP PROPERTY OF WIND WAVES FROM MODULATIONAL INSTABILITY

Hajime Mase; Yuichi Iwagaki

doi:10.9753/icce.v20.43

No. 20 (1986), Conference Proceedings

No. 20 (1986)

WAVE GROUP PROPERTY OF WIND WAVES FROM MODULATIONAL INSTABILITY

Conference Proceedings

https://doi.org/10.9753/icce.v20.43

Published 1986-01-29

Hajime Mase⁺⁻
Yuichi Iwagaki⁺⁻

Hajime Mase

Department of Civil Engineering, Kyoto University

Yuichi Iwagaki

Department of Civil Engineering, Kyoto University

PDF

Keywords

wave group
group properties
wind waves
modulational instability

How to Cite

Mase, H., & Iwagaki, Y. (1986). WAVE GROUP PROPERTY OF WIND WAVES FROM MODULATIONAL INSTABILITY. Coastal Engineering Proceedings, 1(20), 43. https://doi.org/10.9753/icce.v20.43

Abstract

This paper discusses wave grouping of wind waves from the physical viewpoint of wave modulational instability. Amplitude modulation periods obtained from the smoothed instantaneous wave energy history (SIWEH) of the observed data are compared with the predicted values by the modulational instability theory using the Zakharov equation for a finite constant water depth derived by Stiassnie and Shemer(1984). The modulation period normalized by the typical wave period corresponds to the length of total run. It is shown that the amplitude modulation periods of the observed data agree satisfactorily with the predicted values. Thus we conclude that the modulational instability is a hydrodynamical cause of grouping of high waves.

https://doi.org/10.9753/icce.v20.43

PDF

Authors retain copyright and grant the Proceedings right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this Proceedings.

Most read articles by the same author(s)

Yuichi Iwagaki, Toshiyuki Asano, Tsutomu Honda, COMBINATION EFFECT OF PNEUMATIC BREAKWATER AND OTHER TYPE BREAKWATER ON WAVE DAMPING , Coastal Engineering Proceedings: No. 16 (1978): Proceedings of 16th Conference on Coastal Engineering, Hamburg, Germany, 1978.
Jung-A Yang, Sooyoul Kim, Sangyoung Son, Hajime Mase, Nobuhito Mori, UNCERTAINTY ASSESSMENT OF FUTURE CHANGE PROJECTION TO TYPHOON PROPERTIES AND MAXIMUM STORM SURGE HEIGHT DEPENDING OF FUTURE SEA SURFACE TEMPERATURE AND GREENHOUSE GAS EMISSION SCENARIOS , Coastal Engineering Proceedings: No. 36v (2020): Proceedings of virtual Conference on Coastal Engineering, 2020
Sota Nakajo, Nobuhito Mori, Kim Soo-Youl, Tomohiro Yasuda, Fumihiko Yamada, Hajime Mase, BASIC STUDY ON ESTIMATION METHOD OF RETURN PERIOD AND VARIATION RANGE OF SEVERE STORM SURGE EVENT , Coastal Engineering Proceedings: No. 34 (2014): Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014
Masamitsu Kuroiwa, Yoko Shibutani, Yuhei Matsubara, Hajime Mase, A COASTAL AREA MODEL CONSIDERING SAND NOURISHMENT PROCESS , Coastal Engineering Proceedings: No. 34 (2014): Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014
Hajime Mase, Tomohiro Yasuda, Nobuhito Mori, Tracey H. Tom, Ai Ikemoto, Tomoaki Utsunomiya, ANALYSIS AND FORECASTING OF WINDS AND WAVES FOR A FLOATING TYPE WIND TURBINE , Coastal Engineering Proceedings: No. 34 (2014): Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014
Yuichi Iwagaki, HYPERBOLIC WAVES AND THEIR SHOALING , Coastal Engineering Proceedings: No. 11 (1968): Proceedings of 11th Conference on Coastal Engineering, London, United Kingdom, 1968.
Yuu Chida, Nobuhito Mori, Tomohiro Yasuda, Hajime Mase, OPTIMUM SCHEME OF ADAPTIVE MESH REFINEMENT FOR TSUNAMI SIMULATION , Coastal Engineering Proceedings: No. 34 (2014): Proceedings of 34th Conference on Coastal Engineering, Seoul, Korea, 2014
Haruo Higuchi, Yuichi Iwagaki, HYDRAULIC MODEL EXPERIMENT ON THE DIFFUSION DUE TO THE COASTAL CURRENT , Coastal Engineering Proceedings: No. 11 (1968): Proceedings of 11th Conference on Coastal Engineering, London, United Kingdom, 1968.
Yuichi Iwagaki, Toshiyuki Asano, HYDRODYNAMIC FORCES ON A CIRCULAR CYLINDER DUE TO COMBINED WAVE AND CURRENT LOADING , Coastal Engineering Proceedings: No. 19 (1984): Proceedings of 19th Conference on Coastal Engineering, Houston, Texas, 1984.
Tomohiro Yasuda, Hajime Mase, Shoji Kunitomi, Nobuhito Mori, Yuta Hayashi, STOCHASTIC TYPHOON MODEL AND ITS APPLICATION TO FUTURE TYPHOON PROJECTION , Coastal Engineering Proceedings: No. 32 (2010): Proceedings of 32nd Conference on Coastal Engineering, Shanghai, China, 2010.

1 2 3 4 5 6 > >>

WAVE GROUP PROPERTY OF WIND WAVES FROM MODULATIONAL INSTABILITY

Keywords

How to Cite

Download Citation

Abstract

Most read articles by the same author(s)