Surfzone Turbulence and Bubble Dynamics

表面区湍流和气泡动力学

• 批准号: 0136088
• 负责人: John Trowbridge
• 金额: $ 27.28万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-02-15 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0136088&HistoricalAwards=false
• 关键词: Surfzone; Turbulence; Bubble; Dynamics

Trowbridge_0136088A field investigation will be carried out to study the role that bubbles and their associated buoyancy play in the energy balance of the surf zone. Existing measurements do not agree with present models of turbulent dissipation in this region. It is hypothesized that the a significant buoyancy flux associated with bubbles may have an important effect on mean density and, consequently, dissipation. The vertical structure of dissipation, void fraction, and buoyancy flux due to air entrainment will be estimated. New theory for energy budgets and surf zone turbulence will be defined and tested.

Trowbridge_0136088 将进行现场调查，以研究气泡及其相关浮力在冲浪区能量平衡中所起的作用。 现有的测量结果与该区域目前的湍流耗散模型不一致。 据推测，与气泡相关的显着浮力通量可能对平均密度产生重要影响，从而对耗散产生重要影响。 将估计由空气夹带引起的耗散、空隙率和浮力通量的垂直结构。 将定义和测试能量预算和冲浪区湍流的新理论。