ORCID
- Deborah Greaves: 0000-0003-3906-9630
- Alison Raby: 0000-0002-8959-0080
Document Type
Article
Abstract
Experiments are contaminated by second-order error waves at sub- and super-harmonic frequencies when first-order wave generation is used. Herein, we investigate by experiment the implications of second-order wave generation theory for dynamic wave force and run-up on a vertical wall in shallow to intermediate water depth (��0��=0.5−1.1). Results of short-duration experiments using focused wave groups generated according to first- and second-order theory are compared. We isolate linear, sub-, and super-harmonic contributions using combinations of inverted wave group time series and filtering. We derive theoretical predictions for narrow-banded second-order wave groups interacting with a vertical wall and use this to calculate depth-integrated force and run-up on the wall, which show close agreement with measured data. Comparisons reveal that sub-harmonic error waves are increasingly important in shallow depth, increasing wave run-up by up to 67% and dynamic force by up to 75% at ��0��=0.6 when compared to the case of correct (second-order) generation in a relatively short flume.
DOI Link
Publication Date
2023-01-01
Publication Title
Coastal Engineering
Volume
180
ISSN
0378-3839
Acceptance Date
2022-11-26
Deposit Date
2023-01-25
Embargo Period
2023-01-28
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Mortimer, W., Calvert, R., Antonini, A., Greaves, D., Raby, A., & van den Bremer, T. (2023) 'Implications of second-order wave generation for physical modelling of force and run-up on a vertical wall using wave groups', Coastal Engineering, 180. Available at: 10.1016/j.coastaleng.2022.104259
