Wall Turbulence

壁湍流

• 批准号: 9200936
• 负责人: Thomas Hanratty
• 金额: $ 31.1万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-09-15 至 1996-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9200936&HistoricalAwards=false
• 关键词: Wall; Turbulence

A combined modeling and experimental program of research will be conducted on various topics relevant to near-wall turbulence. The primary tools are Particle Imaging Velocimetry and Direct Numerical Simulation. Topics include high Reynolds number channel flow, flow over a wavy wall, flow oscillatory in time, and flow with polymer injection for drag reduction. Wall shear stress in separating and reversing flows will be measured with electrochemical methods. Complex turbulent flows are relevant to a very broad range of industrial processes in Mechanical and Chemical engineering, and there is still a low degree of reliability in predicting their characteristics due to the complexity of turbulence.

将对与近壁湍流相关的各种主题进行模拟和实验研究相结合的方案。主要的工具有粒子成像测速技术和直接数值模拟技术。主题包括高雷诺数槽道流动、波状壁面流动、时间振荡流动和聚合物注入减阻流动。分离和换向流动中的壁面剪应力将用电化学方法测量。在机械和化工领域，复杂的湍流与非常广泛的工业过程有关，由于湍流的复杂性，预测其特性的可靠性仍然很低。