Scaling and Dynamics of Boundary Layer Turbulence

提案编号： CTS-0407932主要制造商：JOSEPH C. KLEWICKI机构： UTAHSCALING大学和边界层湍流的物理学提出的研究的动机是直接的经验观测来自测量在非常高的雷诺数在表面层湍流和环境科学测试（SLTEST）设施在犹他州的西部沙漠，并在新开发的理论基础上湍流壁流直接基于平均动量方程的属性。 关于这两个方面，一个中心的技术主题是理解和表征产生雷诺应力梯度所涉及的运动行为。 基于这些信息，设计了一系列实验来解决壁湍流的基本未解决问题，包括：1）内/外相互作用; 2）相干运动动力学与平均动量输运之间的联系; 3）平均流结构与湍流量尺度之间的联系。 这项工作将侧重于后一个项目，其主要组成部分是在SLTEST设施进行进一步的测量。 最大的影响，新开发的理论将最有可能是一个改进的能力，规模湍流统计。SLTEST设施的实验具有非常广泛和长期的影响。 这种广度源于PI鼓励其他人参加年度实地实验的努力，从而获得与合作相关的技术利益和高研究生产力方面的高效率。长期的影响来自于这样一个事实，即该设施提供了独特的能力，以产生良好的解决方案，在高雷诺数的湍流测量，这是在任何目前的实验室设施。 除了研究生研究人员外，PI还预计将涉及REU计划资助的本科生。大学生已被证明是一个特别重要的组成部分，每年的实地试验研究工作。 研究结果将通过在NSF ITR赠款下开发的网站传播并广泛提供给研究界。

PROPOSAL NO.: CTS-0407932PRINCIPAL INVESTIGATOR: JOSEPH C. KLEWICKIINSTITUTION: UNIVERSITY OF UTAHSCALING AND DYNAMICS OF BOUNDARY LAYER TURBULENCEThe proposed research is motivated by the direct empirical observations derived from measurements at very high Reynolds number at the Surface Layer Turbulence and Environmental Science Test (SLTEST) facility in Utah's west desert, and upon the newly developed theoretical foundation for turbulent wall flow based directly on the properties of the mean momentum equation. With regard to both of these, a central technical theme has been the understanding and characterizing behavior of the motions involved in generating Reynolds stress gradients. With the new insights derived from this information, a set of experiments were designed to address fundamental unresolved issues concerning wall turbulence, as follows: 1) the inner/outer interaction, 2) the connections between coherent motion dynamics and mean momentum transport, and 3) the connections between mean flow structure and the scaling of turbulence quantities. The effort will focus on the latter item with a primary component devoted to further measurements at the SLTEST facility. The greatest impact of the newly developed theory will most likely be related to an improved capacity to scale turbulence statistics. Experiments at the SLTEST facility have very broad and long-term impact. The breadth stems from the efforts of the PI to encourage others to join the yearly field experiments, and thus gain a high level of efficiency relating to both the technical benefits associated with collaborations, and in terms of high research productivity. The long-term impact derives from the fact that the facility offers unique capabilities to produce well-resolved turbulence measurements at high Reynolds numbers which are unavailable in any current laboratory facility. In addition to graduate student researchers, the PI anticipates involving undergraduate students funded under the REU program. Undergraduates have proven to be an especially important component to the yearly field trial research effort. The results will be disseminated and widely accessible to the research community via a web site developed under an NSF ITR grant.