A laboratory study of wind impact on steep unidirectional waves in a long tank
Understanding the effect of wind forcing on steep unidirectional waves is important for the study of wind-wave interaction. In this paper, unidirectional random wave experiments are carried out in a large-scale wave tank in which waves interacted with turbulent wind generated by wind fans. The prope...
| Main Authors: | , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
American Physical Society
2024
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| _version_ | 1811140305937760256 |
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| author | Zhang, Z Tang, T Zheng, X Xu, W Zhang, L Lee, J-H Adcock, TAA Monty, JP Slunyaev, A van den Bremer, TS Li, Y |
| author_facet | Zhang, Z Tang, T Zheng, X Xu, W Zhang, L Lee, J-H Adcock, TAA Monty, JP Slunyaev, A van den Bremer, TS Li, Y |
| author_sort | Zhang, Z |
| collection | OXFORD |
| description | Understanding the effect of wind forcing on steep unidirectional waves is important for the study of wind-wave interaction. In this paper, unidirectional random wave experiments are carried out in a large-scale wave tank in which waves interacted with turbulent wind generated by wind fans. The properties and evolution of deep-water gravity waves subject to following wind forcing are investigated through parametric laboratory experiments. The effect of wind forcing on the significant wave height varies with the initial wave steepness. Wind forcing increases the growth of waves of small initial steepness but attenuates large, steep waves, as a result of the vertical angle of the wind to the free surface in our experiments. The energy input by wind forcing increases the highfrequency tail of the wave spectra, and this effect increases with fetch. The mean frequency increases under wind forcing. The effect of wind forcing on the probability of extreme events is investigated. Wind forcing enhances wave steepness, resulting in a deviation of the exceedance probability from first-order and second-order theoretical distributions and an increased value of kurtosis but not skewness. |
| first_indexed | 2024-09-25T04:19:53Z |
| format | Journal article |
| id | oxford-uuid:0eee76bd-1e55-475e-a631-488a01206d02 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-09-25T04:19:53Z |
| publishDate | 2024 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:0eee76bd-1e55-475e-a631-488a01206d022024-08-08T11:25:38ZA laboratory study of wind impact on steep unidirectional waves in a long tankJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:0eee76bd-1e55-475e-a631-488a01206d02EnglishSymplectic ElementsAmerican Physical Society2024Zhang, ZTang, TZheng, XXu, WZhang, LLee, J-HAdcock, TAAMonty, JPSlunyaev, Avan den Bremer, TSLi, YUnderstanding the effect of wind forcing on steep unidirectional waves is important for the study of wind-wave interaction. In this paper, unidirectional random wave experiments are carried out in a large-scale wave tank in which waves interacted with turbulent wind generated by wind fans. The properties and evolution of deep-water gravity waves subject to following wind forcing are investigated through parametric laboratory experiments. The effect of wind forcing on the significant wave height varies with the initial wave steepness. Wind forcing increases the growth of waves of small initial steepness but attenuates large, steep waves, as a result of the vertical angle of the wind to the free surface in our experiments. The energy input by wind forcing increases the highfrequency tail of the wave spectra, and this effect increases with fetch. The mean frequency increases under wind forcing. The effect of wind forcing on the probability of extreme events is investigated. Wind forcing enhances wave steepness, resulting in a deviation of the exceedance probability from first-order and second-order theoretical distributions and an increased value of kurtosis but not skewness. |
| spellingShingle | Zhang, Z Tang, T Zheng, X Xu, W Zhang, L Lee, J-H Adcock, TAA Monty, JP Slunyaev, A van den Bremer, TS Li, Y A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title | A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title_full | A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title_fullStr | A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title_full_unstemmed | A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title_short | A laboratory study of wind impact on steep unidirectional waves in a long tank |
| title_sort | laboratory study of wind impact on steep unidirectional waves in a long tank |
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