ERI: Wake interactions past two roughness elements in close proximity to a surface

ERI:靠近表面的两个粗糙度元素的尾流相互作用

基本信息

  • 批准号:
    2301453
  • 负责人:
  • 金额:
    $ 19.82万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2023
  • 资助国家:
    美国
  • 起止时间:
    2023-04-01 至 2025-03-31
  • 项目状态:
    未结题

项目摘要

The turbulent flow over two roughness elements in close proximity on an otherwise relatively smooth surface is encountered in environmental and engineering applications (e.g., two dunes in close proximity and two protrusions in close succession on an engineered surface). The interactions between the upstream wake and the downstream wake govern important flow features including drag and turbulence. This project aims to quantify and understand the wake interactions between two roughness elements in close proximity under incoming turbulent flow. For this purpose, flow measurements will be made for a wide range of configurations using state-of-the-art instrumentation. The project will be performed at an undergraduate institution providing foundation for engineering research and enhancing undergraduate research training. The project will provide engaging research experiences for undergraduate students who will gain valuable research training and mentoring while working alongside faculty.High-speed volumetric particle image velocimetry, a non-intrusive laser-diagnostic flow measurement technique, will be used to measure the flow over two cylindrical roughness elements positioned in close proximity and immersed in a turbulent boundary layer. The cylinders will be positioned at various configurations to vary the degree by which the upstream cylinder shelters the downstream cylinder from the incoming high-momentum flow. The experiments will allow for the characterization of rich flow physics: the interaction of two 3D shear layers in the lower portion of a turbulent boundary layer. The objectives are to 1) quantify the flow interactions between the wakes of the two cylindrical roughness elements; 2) characterize the vortical structures shed from isolated cylindrical roughness elements and identify the modifications to these structures due to the introduction of an upstream cylinder; 3) investigate the effects of additional upstream elements (i.e., sheltering by 2, 3, and 4 upstream elements) on the captured flow physics, 4) quantify the roughness-induced perturbation to the boundary layer and its coherent structures; and 5) distill a spatiotemporally-resolved flow description that illustrates sheltering flow physics across a wide range of arrangements. The spatially- and temporally-resolved measurements will aid in addressing a gap in the literature on the flow over two roughness elements in close proximity, offer insight into the rich flow physics involved, and provide benchmark results to aid other researchers in their modeling and validation efforts.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.
在环境和工程应用(例如,两个紧密靠近的沙丘和在工程表面上紧密连续的两个突起)。上游尾流和下游尾流之间的相互作用决定了重要的流动特征,包括阻力和湍流。该项目旨在量化和理解两个粗糙度元素之间的尾流相互作用在接近下传入湍流。为此,将使用最先进的仪器对各种配置进行流量测量。该项目将在一所本科院校进行,为工程研究提供基础,并加强本科生的研究培训。该项目将为本科生提供引人入胜的研究经验,他们将获得宝贵的研究培训和指导,同时与教师一起工作。高速体积粒子图像测速技术,一种非侵入式激光诊断流量测量技术,将用于测量两个圆柱形粗糙度元件上的流量,该元件位于湍流边界层附近并浸没在湍流边界层中。气缸将被定位在不同的配置,以改变上游气缸从进入的高动量流遮蔽下游气缸的程度。实验将允许丰富的流动物理特性:在湍流边界层的下部的两个三维剪切层的相互作用。目标是:1)量化两个圆柱形粗糙度元件尾流之间的流动相互作用; 2)表征从孤立圆柱形粗糙度元件脱落的旋涡结构,并确定由于引入上游圆柱体而对这些结构的修改; 3)研究附加上游元件(即,由2、3和4个上游元件遮蔽)对捕获的流物理特性进行量化,4)对边界层及其相干结构的粗糙度引起的扰动进行量化;以及5)提取时空分辨的流描述,其示出了跨越宽范围布置的遮蔽流物理特性。空间和时间分辨的测量将有助于解决文献中关于两个非常接近的粗糙元件上的流动的空白,提供对所涉及的丰富流动物理的洞察,该奖项反映了NSF的法定使命,并被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准。

项目成果

期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

数据更新时间:{{ journalArticles.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ monograph.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ sciAawards.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ conferencePapers.updateTime }}

{{ item.title }}
  • 作者:
    {{ item.author }}

数据更新时间:{{ patent.updateTime }}

Ali Hamed其他文献

Plant Stress Mitigators
植物应激缓解剂
  • DOI:
  • 发表时间:
    2022
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Ahmad Mahmood;Hande Bardak;Duygu Bozdoan;Taku Yamaguchi;Ali Hamed;Ryota Kataoka;and Oguz Can Turgay
  • 通讯作者:
    and Oguz Can Turgay
Correction: Protecting potato plants against PVX and PVY viral infections by the application of native and chemically modified legume proteins
  • DOI:
    10.1007/s41348-023-00823-8
  • 发表时间:
    2023-12-12
  • 期刊:
  • 影响因子:
    2.200
  • 作者:
    Mahmoud Sitohy;Soad Taha;Mahmoud Abdel-Hamid;Ashraf Abdelbacki;Ali Hamed;Ali Osman
  • 通讯作者:
    Ali Osman

Ali Hamed的其他文献

{{ item.title }}
{{ item.translation_title }}
  • DOI:
    {{ item.doi }}
  • 发表时间:
    {{ item.publish_year }}
  • 期刊:
  • 影响因子:
    {{ item.factor }}
  • 作者:
    {{ item.authors }}
  • 通讯作者:
    {{ item.author }}

{{ truncateString('Ali Hamed', 18)}}的其他基金

MRI: Acquisition of a high-speed volumetric particle image velocimetry system for fluid mechanics research and research training in science, mathematics, and engineering
MRI:获取高速体积粒子图像测速系统,用于流体力学研究和科学、数学和工程方面的研究培训
  • 批准号:
    1919570
  • 财政年份:
    2019
  • 资助金额:
    $ 19.82万
  • 项目类别:
    Standard Grant

相似海外基金

The role of post-traumatic sleep-wake disruption in the development of tau pathology following mild traumatic brain injury
创伤后睡眠觉醒中断在轻度创伤性脑损伤后 tau 病理学发展中的作用
  • 批准号:
    10588916
  • 财政年份:
    2023
  • 资助金额:
    $ 19.82万
  • 项目类别:
Mentored Patient-Oriented Research of Novel Mechanisms Linking Pain, Sleep-Wake Patterns, and Autonomic Activity in Rheumatic Diseases
指导以患者为导向的风湿性疾病中疼痛、睡眠-觉醒模式和自主活动相关新机制的研究
  • 批准号:
    10592158
  • 财政年份:
    2023
  • 资助金额:
    $ 19.82万
  • 项目类别:
Neuron-astrocyte interactions mediating ethanol and noradrenergic modulation of wake-promoting vPAG dopamine neurons
神经元-星形胶质细胞相互作用介导促醒 vPAG 多巴胺神经元的乙醇和去甲肾上腺素能调节
  • 批准号:
    10588136
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Neuron-astrocyte interactions mediating ethanol and noradrenergic modulation of wake-promoting vPAG dopamine neurons
神经元-星形胶质细胞相互作用介导促醒 vPAG 多巴胺神经元的乙醇和去甲肾上腺素能调节
  • 批准号:
    10463298
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Brainstem circuitry for sleep-wake control
用于睡眠-觉醒控制的脑干电路
  • 批准号:
    10623653
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Wake Forest IMPOWR Dissemination Education and Coordination Center (IDEA-CC)
维克森林 IMPOWR 传播教育和协调中心 (IDEA-CC)
  • 批准号:
    10601172
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Brainstem circuitry for sleep-wake control
用于睡眠-觉醒控制的脑干电路
  • 批准号:
    10641961
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Deregulation of Sleep/Wake Homeostasis by Binge Alcohol Use Following Traumatic Brain Injury
创伤性脑损伤后酗酒导致睡眠/觉醒稳态失调
  • 批准号:
    10683216
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Deregulation of Sleep/Wake Homeostasis by Binge Alcohol Use Following Traumatic Brain Injury
创伤性脑损伤后酗酒导致睡眠/觉醒稳态失调
  • 批准号:
    10527774
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
Vortex Interactions and Unsteady Wake Dynamics
涡相互作用和不稳定尾流动力学
  • 批准号:
    RGPIN-2020-03998
  • 财政年份:
    2022
  • 资助金额:
    $ 19.82万
  • 项目类别:
    Discovery Grants Program - Individual
{{ showInfoDetail.title }}

作者:{{ showInfoDetail.author }}

知道了