• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Physical Oceanography >Impact of Dominant Breaking Waves on Air-Sea Momentum Exchange and Boundary Layer Turbulence at High Winds
【24h】

Impact of Dominant Breaking Waves on Air-Sea Momentum Exchange and Boundary Layer Turbulence at High Winds

机译：大风时主突波对海气动力交换和边界层湍流的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Large-eddy simulation (LES) is used to investigate how dominant breaking waves in the ocean under hurricane-force winds affect the drag and near-surface airflow turbulence. The LES explicitly resolves the wake turbulence produced by dominant-scale breakers. Effects of unresolved roughness such as short breakers, nonbreaking waves, and sea foam are modeled as the subgrid-scale drag. Compared to the laboratory conditions previously studied using the same method, dominant-scale breakers in open-ocean conditions are less frequent, and the subgrid-scale drag is more significant. Nevertheless, dominant-scale breakers are more fully exposed to high winds and produce more intense wakes individually. As a result, they support a large portion of the total drag and significantly influence the turbulence for many ocean conditions that are likely to occur. The intense wake turbulence is characterized by flow separation, upward bursts of wind, and upward flux of the turbulent kinetic energy (TKE), all of which may influence sea spray dispersion. Similarly to the findings in the laboratory conditions, high production of wake turbulence shortcuts the inertial energy cascade, causes high TKE dissipation, and contributes to the reduction of the drag coefficient. The results also indicate that if the drag coefficient decreases with increasing wind at very high winds, as some recent observations suggest, then the unresolved roughness must also decrease.
机译：大涡模拟（LES）用于研究飓风作用下海洋中主要的破碎波如何影响阻力和近地表气流湍流。 LES明确解决了占主导地位的断路器产生的尾流湍流。未解决的粗糙度（例如，短破碎锤，不间断波浪和海泡沫）的影响被建模为亚网格规模阻力。与以前使用相同方法研究的实验室条件相比，在开放海洋条件下占主导地位的破碎锤的频率较低，而亚电网规模的阻力更为显着。然而，占主导地位的破碎锤更充分地暴露于强风中，并单独产生更强烈的尾流。结果，它们支撑了总阻力的很大一部分，并在可能发生的许多海洋条件下显着影响了湍流。强烈的尾流湍流的特征是流动分离，向上的阵风和湍流动能（TKE）的向上通量，所有这些都可能影响海浪散布。与实验室条件下的发现类似，尾流湍流的大量产生会缩短惯性能量级联，导致较高的TKE耗散，并有助于降低阻力系数。结果还表明，如最近的一些观察所表明的那样，如果风阻在非常高的风中随风的增加而减小，那么未解决的粗糙度也必须减小。

著录项

  • 来源
    《Journal of Physical Oceanography》 |2014年第4期|1195-1212|共18页
  • 作者

    Nobuhiro Suzuki; Tetsu Hara; Peter P. Sullivan;

  • 作者单位

    Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island,Brown University, 324 Brook St., Providence, RI 02912;

    Graduate School of Oceanography, University of Rhode Island, Narragansett, Rhode Island;

    National Center for Atmospheric Research, Boulder, Colorado;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号