MRI: Acquisition of Environmental Flows Water Tunnel

MRI：获取环境流量水隧道

• 批准号: 1625782
• 负责人: Diane Foster
• 金额: $ 61.8万
• 依托单位: University of New Hampshire
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-10-01 至 2019-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1625782&HistoricalAwards=false
• 关键词: MRI; Acquisition; Environmental; Flows; Water

Scientists and engineers interested in ocean and environmental fluid mechanics are involved in an array of fundamental research with interests ranging from the deep ocean to shallow streams. The dynamics of these flows are generally complex, as they involve fluid, geological, chemical, and biological processes occurring in a wide range of temporal and spatial scales. These flows may have either fixed or dynamic boundary conditions (i.e., seabeds) and may contained fixed engineered structures (e.g., hydrokinetic devices). While many fluid flow problems are well suited to small-scale laboratory studies, significant scaling concerns arise with complex unsteady multi-phase flows interacting with fixed or dynamic boundaries and structures. A unique feature of the concentration of the regional faculty, post-docs and graduate students working on these complex flows is the synergy that results from researchers with different backgrounds addressing a variety of problems with the commonalities provided by fluid physics. Individually, research efforts will evaluate fundamental hypotheses necessary for advancing the respective fields. Collectively, the synergies realized through transdisciplinary interactions between contributing scientists have an extremely high potential to transform understanding of the complex fluid flows that are ubiquitous in engineering and nature.With a goal towards significantly advancing the simulation of flow physics and biogeochemical processes involved in aquatic marine and riverine environments, this effort will support the acquisition of an Environmental Flows Water Tunnel (EFWT) and instrumentation required for resolving the flow and sediment fields. The EFWT will accommodate both oscillatory and steady flow for the simulation of horizontal wave velocities, tidal flows, or steady currents with both high- and low-velocity magnitudes. The EFWT will operate as a rigid-lid (non-free surface) tunnel or as a flume/channel with a reduced-depth free surface while allowing for either rigid bottom boundaries or movable sediment beds with or without aquatic vegetation. It will also allow for the evaluation of engineered systems, high frequency acoustic characterization of the seafloor, and scale model marine hydrokinetic energy conversion devices or small arrays. The EFWT will provide the instrumentation necessary for addressing fundamental questions involving ocean and environmental fluid mechanics and will serve as a valuable local, regional, and national resource for academic, governmental, and industrial partners. The EFWT will allow for scientific advancement in a range of geophysical and engineered topics that require the resolution of fluid-sediment-structure interactions in riverine and ocean environments. Observations will be used to contribute to open-source community modeling efforts (e.g., benchmark data sets), develop a novel understanding of processes that impact ecosystem health, improve undersea technology, evaluate ocean renewable energy devices, and provide a vehicle for public outreach and education. The EFWT will be used for hands-on laboratory and demonstration purposes both within University of New Hampshire through courses in earth sciences, civil engineering, mechanical engineering and ocean engineering (with its new undergraduate major program) and also, through a multitude of continuous outreach efforts.

对海洋和环境流体力学感兴趣的科学家和工程师参与了一系列基础研究，兴趣范围从深海到浅流。这些流动的动力学通常是复杂的，因为它们涉及在广泛的时间和空间尺度上发生的流体、地质、化学和生物过程。这些流可以具有固定或动态边界条件（即，海床）并且可以包含固定的工程结构（例如，流体动力装置）。虽然许多流体流动问题非常适合于小规模的实验室研究，但与固定或动态边界和结构相互作用的复杂非定常多相流引起了显着的缩放问题。区域教师，博士后和研究生集中在这些复杂的流动的一个独特的特点是协同作用，结果从不同背景的研究人员解决各种问题与流体物理学提供的共性。个别地，研究工作将评估推进各自领域所需的基本假设。总的来说，通过贡献科学家之间的跨学科互动实现的协同效应具有极大的潜力，可以改变对工程和自然界中普遍存在的复杂流体流动的理解。为了显著推进水、海洋和河流环境中涉及的流动物理和生物地球化学过程的模拟，这项工作将支持获得环境水流隧道（EFWT）和用于解析水流和沉积物场所需的仪器。EFWT将适应振荡流和稳定流，用于模拟水平波速度、潮汐流或具有高速度和低速度幅度的稳定流。EFWT将作为刚性盖（非自由表面）隧道或具有深度减小的自由表面的水槽/通道运行，同时允许刚性底部边界或带有或不带有水生植被的可移动沉积床。它还将允许评估工程系统、海底高频声学特性以及比例模型海洋流体动力能量转换装置或小型阵列。EFWT将为解决涉及海洋和环境流体力学的基本问题提供必要的仪器，并将作为学术，政府和工业合作伙伴的宝贵的地方，区域和国家资源。EFWT将允许在一系列需要解决河流和海洋环境中流体-沉积物-结构相互作用的地球物理和工程主题方面取得科学进步。观察结果将用于为开源社区建模工作做出贡献（例如，基准数据集），对影响生态系统健康的过程形成新的理解，改进海底技术，评估海洋可再生能源设备，并为公众宣传和教育提供工具。EFWT将用于实践实验室和演示的目的，无论是在新罕布什尔州通过地球科学，土木工程，机械工程和海洋工程（与其新的本科专业课程）的课程，并通过大量的持续推广工作。