{"title":"Experimental Study of Wind Interaction with a Wave Induced by a Wave Generator in a Direct Channel","authors":"I. N. Ivanova, O. N. Melnikova","doi":"10.3103/S0027134923060073","DOIUrl":null,"url":null,"abstract":"<p>An experimental study has been conducted on the effect of wind blowing on a wave induced by a wave generator in a direct channel. It is shown that with a small wave steepness <span>\\(ak<0.1\\)</span> and wind speed <span>\\(W<2.3\\)</span> m/s, a drift current is generated on the water surface due to the action of viscous forces. A formula for calculating its velocity is proposed. It has been found that the phase velocity of the wave increases with the emergence of drift current and can be calculated by the formula obtained for linear waves in a flow with a constant velocity shear. With an increase in wave steepness <span>\\(ak>0.19\\)</span> and wind speed <span>\\(W>2.3\\)</span> m/s, the formation of a vortex deforming the water surface over the wave crest was observed in the air flow over the wave crest. The vortex destroys the viscous layer, reducing the drift velocity. This also reduces the phase velocity and the length of the wave. A mechanism explaining this process has been proposed.</p>","PeriodicalId":711,"journal":{"name":"Moscow University Physics Bulletin","volume":"78 6","pages":"870 - 875"},"PeriodicalIF":0.4000,"publicationDate":"2024-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Moscow University Physics Bulletin","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S0027134923060073","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
An experimental study has been conducted on the effect of wind blowing on a wave induced by a wave generator in a direct channel. It is shown that with a small wave steepness \(ak<0.1\) and wind speed \(W<2.3\) m/s, a drift current is generated on the water surface due to the action of viscous forces. A formula for calculating its velocity is proposed. It has been found that the phase velocity of the wave increases with the emergence of drift current and can be calculated by the formula obtained for linear waves in a flow with a constant velocity shear. With an increase in wave steepness \(ak>0.19\) and wind speed \(W>2.3\) m/s, the formation of a vortex deforming the water surface over the wave crest was observed in the air flow over the wave crest. The vortex destroys the viscous layer, reducing the drift velocity. This also reduces the phase velocity and the length of the wave. A mechanism explaining this process has been proposed.
期刊介绍：
Moscow University Physics Bulletin publishes original papers (reviews, articles, and brief communications) in the following fields of experimental and theoretical physics: theoretical and mathematical physics; physics of nuclei and elementary particles; radiophysics, electronics, acoustics; optics and spectroscopy; laser physics; condensed matter physics; chemical physics, physical kinetics, and plasma physics; biophysics and medical physics; astronomy, astrophysics, and cosmology; physics of the Earth’s, atmosphere, and hydrosphere.
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