Experimental environmental hydraulics: entrainment and mixing in turbulent flows

实验环境水力学：湍流中的夹带和混合

• 批准号: RGPIN-2016-04473
• 负责人: Gaskin, Susan
• 金额: $ 2.62万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=651565
• 关键词: Experimental; environmental; hydraulics; entrainment; mixing

Turbulent flows are present in both natural and anthropogenic environments. The proposed research in environmental hydraulics will study turbulent flows found in the atmosphere and hydrosphere that are relevant to processes in environmental pollutant dispersion, ocean mixing, fluvial geomorphology, energy and meteorology, and can also be applied to industrial processes such as combustion. My main long term goal is to improve the understanding of turbulent entrainment and turbulent mixing in environmental hydraulics using innovative experiments and related analysis, and complemented by numerical modelling. My four long term objectives are: 1) maintaining a solid program of experimental environmental hydraulics (using techniques such as LIF, PIV, PTV, ADV, anemometry), 2) developing new experimental methods, tools and analysis techniques, 3) extending my research area into new areas, 4) continuing to train students at all levels. My philosophy involves performing rigorous research that i) is fundamental and provides valuable insight into the physics of the processes, and ii) can be applied to improve both engineering processes and predictions of natural phenomena.***To achieve these long-term goals, the present application proposes five complementary research components on: 1) the effect of background turbulence on the hydrodynamics of a turbulent jet, 2) molecular effects in flows involving the mixing of two or more chemical species, 3) the suppression of mixing downstream of the confluence of two shallow rivers, 4) quantifying biogenic oceanic turbulence and mixing, and 5) exploration of emerging topics. This research will provide the training of HQP in a research team of 4 Ph.D. students, 5 M.Eng. students and 5 undergraduate summer research students. ****The impact of the above studies will be to advance our understanding of turbulent flows in environmental hydraulics by answering previously unresolved questions and disseminating the results in high quality publications. The knowledge obtained will benefit Canada by i) answering useful question of immediate relevance to engineering and environmental flows (1-5), ii) being incorporated into (governmental or other) models of environmental pollutant dispersion to improve their accuracy (1-3), iii) improving our understanding of oceanic mixing that will improve climate change predictions, and iv) advancing my long term objectives.**

自然和人为环境中都存在湍流。 拟议的环境水力学研究将研究大气和水圈中发现的湍流，这些湍流与环境污染物扩散、海洋混合、河流地貌、能源和气象过程相关，也可应用于燃烧等工业过程。 我的主要长期目标是通过创新实验和相关分析，并辅之以数值建模，提高对环境水力学中湍流夹带和湍流混合的理解。 我的四个长期目标是：1）维持实验环境水力学的可靠计划（使用 LIF、PIV、PTV、ADV、风速测定等技术），2）开发新的实验方法、工具和分析技术，3）将我的研究领域扩展到新领域，4）继续培训各个级别的学生。 我的理念包括进行严格的研究，i) 是基础性的，为过程的物理过程提供有价值的见解，ii) 可用于改进工程过程和自然现象的预测。***为了实现这些长期目标，本申请提出了五个互补的研究组成部分：1) 背景湍流对湍流射流的流体动力学的影响，2) 涉及两种或多种混合的流动中的分子效应 化学物种，3）抑制两条浅河交汇处下游的混合，4）量化生物海洋湍流和混合，5）探索新兴主题。 这项研究将为由 4 名博士组成的研究团队提供 HQP 培训。学生，5 名工程硕士学生和 5 名本科暑期研究生。 ****上述研究的影响将是通过回答以前未解决的问题并在高质量出版物中传播结果，增进我们对环境水力学中湍流的理解。 所获得的知识将使加拿大受益：i) 回答与工程和环境流直接相关的有用问题 (1-5)，ii) 纳入（政府或其他）环境污染物扩散模型以提高其准确性 (1-3)，iii) 增进我们对海洋混合的理解，从而改善气候变化预测，以及 iv) 推进我的长期目标。**