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CAREER: Interaction of Turbulence with Flexible Surfaces: Coherent Structures and Near-Wall Dynamics

职业：湍流与柔性表面的相互作用：相干结构和近壁动力学

基本信息

批准号：
1944568
负责人：
Yulia Peet
金额：
$ 50万
依托单位：
Arizona State University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-01-01 至 2024-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1944568&HistoricalAwards=false
关键词：
CAREER Interaction Turbulence Flexible Surfaces

项目摘要

The project will investigate the interactions between the flexible surfaces and turbulent flows. The analysis will be based on the combination of computational fluid dynamics simulations and theory. Surfaces that deform under the influence of fluid forces occur in many practical situations, such as vibrations of aircraft wings, human blood vessels, and compliant coatings. The goal of this project is to develop new theories that help explain how these interactions will change the structure of the flow. Simple demonstrations of the fluid-structure interactions in an everyday life will be designed for the outreach activities targeted to females and minorities conducted in collaboration with the university office of education. The focus of the current project is on investigation of the mechanisms involved with the interaction between the flexible surfaces and the near-wall turbulence. Particular emphasis is on understanding of 1) how passive and active wall motions alter the near-wall turbulence cycle, 2) whether and why these alterations lead to a turbulence reduction, and 3) what factors are responsible for changing the mode of interaction. A comparison between the isotropic and anisotropic wall motions will be made to investigate the potential differences of the influence of these motions on the near-wall turbulence cycle. The above goals will be accomplished via a combination of high-fidelity Direct Numerical Simulations (DNS) of a coupled fluid-structure interaction problem, and a suite of analysis tools, including a resolvent analysis, and a linear stochastic estimation approach. Resolvent analysis will provide a-priori and a-posteriori estimates of the effect of certain flow and material parameters on a likelihood of achieving a desired mode of interaction. The educational objectives of the current project are devoted to attraction and retention of female researchers to the field of engineering, accomplished via local outreach activities, as well as a development of interactive fluid flow visualizations for the Internet and iPhone applications, targeted to elementary and middle school children.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该项目将研究柔性表面和湍流之间的相互作用。分析将基于计算流体动力学模拟和理论的结合。在流体力的影响下变形的表面发生在许多实际情况中，例如飞机机翼、人体血管和顺应性涂层的振动。这个项目的目标是发展新的理论，帮助解释这些相互作用将如何改变流的结构。日常生活中的流体-结构相互作用的简单演示将被设计用于与大学教育办公室合作开展的针对女性和少数民族的外展活动。目前的项目的重点是调查与柔性表面和近壁湍流之间的相互作用的机制。特别强调理解1）被动和主动壁运动如何改变近壁湍流循环，2）这些改变是否以及为什么导致湍流减少，以及3）哪些因素负责改变相互作用模式。通过对各向同性和各向异性壁面运动的比较，研究了壁面运动对近壁湍流循环影响的潜在差异。上述目标将通过耦合流体-结构相互作用问题的高保真直接数值模拟（DNS）和一套分析工具（包括预解式分析和线性随机估计方法）的组合来实现。预解式分析将提供某些流动和材料参数对实现期望的相互作用模式的可能性的影响的先验和后验估计。目前项目的教育目标是通过当地的外联活动，以及为互联网和iPhone应用程序开发交互式流体流动可视化，致力于吸引和留住工程领域的女研究人员，该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准。

项目成果

期刊论文数量（12）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Linear Stability of Plane Poiseuille Flow in the Sense of Lyapunov

李雅普诺夫意义上的平面泊肃叶流的线性稳定性

DOI：
发表时间：
2023
期刊：
62nd IEEE Conference on Decision and Control
影响因子：
0
作者：
Edwards, C;Peet, Y.
通讯作者：
Peet, Y.

Cost vs Accuracy: DNS of turbulent flow over a sphere using structured immersed-boundary, unstructured finite-volume, and spectral-element methods

成本与精度：使用结构化浸入边界、非结构化有限体积和谱元方法对球体上的湍流进行 DNS 分析

DOI：
10.1016/j.euromechflu.2023.07.008
发表时间：
2023
期刊：
European Journal of Mechanics - B/Fluids
影响因子：
0
作者：
Capuano, Francesco;Beratlis, Nikolaos;Zhang, Fengrui;Peet, Yulia;Squires, Kyle;Balaras, Elias
通讯作者：
Balaras, Elias

Verification and convergence study of a spectral-element numerical methodology for fluid-structure interaction

流固耦合谱元数值方法的验证和收敛性研究