Collaborative Research: Advancing turbidity currents: moving sources, polydispersity and aggregation

合作研究:推进浊流:移动源、多分散性和聚集

基本信息

  • 批准号:
    2138583
  • 负责人:
  • 金额:
    $ 22.5万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2022
  • 资助国家:
    美国
  • 起止时间:
    2022-02-01 至 2024-09-30
  • 项目状态:
    已结题

项目摘要

Gravity currents are mostly horizontal flows that are driven by density variations in a fluid or by density differences between two fluids. They play a central role in the transport of sediment in lakes, rivers, and oceans, and they are also important in emerging and potentially transformative technologies such as deep-sea mining and geoengineering. Despite a rich history of research on gravity currents, some fundamental scenarios have yet to be explored or remain substantially unresolved. This collaborative project will integrate analytical modeling, numerical simulation and laboratory experimentation with a unique field experimental data set to advance understanding of particle-laden gravity currents. This project has potential for transformative impacts by informing environmental regulations for such emerging industries as deep-sea mining. Deep-sea mining is expected to re-suspend large volumes of sediment in the pristine abyssal ocean environment, and the knowledge and models developed through this project will provide the toolbox needed to assess the evolution of these sediment plumes. The project will provide training for university students at all academic levels and for high-school students who will participate in the project through established programs at MIT and UCSB. The project is divided into three interconnected topics. The first concerns the evolution of gravity and particle-driven currents released from a moving source. The goals are to understand how the ratio of source speed to buoyancy velocity influences the dynamics of the current, investigate the role of background current, and develop empirical models that predict transport processes. The second point of focus is to quantify sediment detrainment from polydisperse particle-driven currents and determine its sensitivity to the particle size and velocity distribution through concurrent laboratory experiments and numerical simulations. Empirical models of polydisperse particle-driven currents will be extended to include entrainment and detrainment and incorporated into the moving source gravity current model. Finally, the role of flocculation and aggregation of particles on the propagation of polydisperse particle-driven currents will be experimentally investigated by systematically varying the sediment’s history, with the goal of developing macroscale numerical models for flocculation and integrating the findings into the moving source model.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.
重力流主要是由流体中的密度变化或两种流体之间的密度差驱动的水平流动。它们在湖泊、河流和海洋的沉积物运输中发挥着核心作用,在深海采矿和地球工程等新兴和潜在的变革性技术中也很重要。尽管对重力流的研究历史悠久,但一些基本情景尚未探索或基本上仍未解决。这个合作项目将把分析建模、数值模拟和实验室实验与独特的现场实验数据集结合起来,以促进对载有颗粒的重力流的理解。该项目有可能通过为深海采矿等新兴行业的环境法规提供信息,产生变革性影响。预计深海采矿将使大量沉积物重新悬浮在原始深海环境中,通过这一项目开发的知识和模型将提供评估这些沉积物羽流演变所需的工具箱。 该项目将为所有学术水平的大学生和高中生提供培训,这些学生将通过麻省理工学院和UCSB的既定项目参与该项目。 该项目分为三个相互关联的主题。第一个是关于重力的演变和从移动源释放的粒子驱动的电流。目标是了解源速度与浮力速度的比率如何影响当前的动态,调查背景电流的作用,并开发预测运输过程的经验模型。第二个重点是量化沉积物从多分散颗粒驱动的电流,并确定其敏感性的颗粒大小和速度分布,通过同步实验室实验和数值模拟。多分散颗粒驱动流的经验模型将被扩展到包括夹带和分离,并纳入移动源重力流模型。最后,将通过系统地改变沉积物的历史,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(2)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Mixing, entrainment and energetics of gravity currents released from two-layer stratified locks
  • DOI:
    10.1017/jfm.2023.146
  • 发表时间:
    2023-03
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    R. Zhu;Zhiguo He;E. Meiburg
  • 通讯作者:
    R. Zhu;Zhiguo He;E. Meiburg
Grain-resolving simulations of submerged cohesive granular collapse
  • DOI:
    10.1017/jfm.2022.404
  • 发表时间:
    2022-05
  • 期刊:
  • 影响因子:
    3.7
  • 作者:
    R. Zhu;Zhiguo He;K. Zhao;B. Vowinckel;E. Meiburg
  • 通讯作者:
    R. Zhu;Zhiguo He;K. Zhao;B. Vowinckel;E. Meiburg
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Eckart Meiburg其他文献

Eckart Meiburg的其他文献

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{{ truncateString('Eckart Meiburg', 18)}}的其他基金

Collaborative Research: Two-way Coupled Fluid/Particulate Transport in Fractured Media - Bridging the Scales from Microscopic Origins to Macroscopic Networks
合作研究:断裂介质中的双向耦合流体/颗粒传输 - 连接从微观起源到宏观网络的尺度
  • 批准号:
    2100691
  • 财政年份:
    2021
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
NSF-BSF: Multiphase transport processes with phase change in stratified hypersaline lakes: A combined computational and field investigation
NSF-BSF:分层超盐湖中具有相变的多相传输过程:计算和现场调查相结合
  • 批准号:
    1936258
  • 财政年份:
    2020
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Understanding the physics of flocculation processes and cohesive sediment transport in bottom boundary layers through multi-scale modeling
合作研究:通过多尺度建模了解底部边界层絮凝过程和粘性沉积物输送的物理原理
  • 批准号:
    1924655
  • 财政年份:
    2019
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Cohesive Sediment Dynamics in Turbulent Flow
湍流中的粘性沉积物动力学
  • 批准号:
    1803380
  • 财政年份:
    2018
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Travel Support for U.S. Participants Attending the 8th International Symposium on Stratified Flows (San Diego, August 29 - September 1, 2016)
为参加第八届分层流国际研讨会(圣地亚哥,2016 年 8 月 29 日至 9 月 1 日)的美国与会者提供差旅支持
  • 批准号:
    1630244
  • 财政年份:
    2016
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
UNS:Collaborative Research: Multiscale interactions between active particles and stratified fluids during collective vertical migration
UNS:合作研究:集体垂直迁移过程中活性颗粒与分层流体之间的多尺度相互作用
  • 批准号:
    1510615
  • 财政年份:
    2015
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Travel Support for U.S. Participants Attending the IUTAM Symposium on Multiphase Flows with Phase Change: Challenges and Opportunities, December 8 - 11, 2014, Hyderabad, India
为参加 IUTAM 相变多相流研讨会的美国参与者提供差旅支持:挑战与机遇,2014 年 12 月 8 日至 11 日,印度海得拉巴
  • 批准号:
    1417294
  • 财政年份:
    2014
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Collaborative Research: Double-diffusive sedimentation
合作研究:双扩散沉降
  • 批准号:
    1438052
  • 财政年份:
    2014
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Gravity Currents and Related Phenomena: A Circulation-Based Modeling Framework
重力流和相关现象:基于环流的建模框架
  • 批准号:
    1335148
  • 财政年份:
    2013
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant
Gravity and Turbidity Currents Interacting with Interfaces of Free Surfaces
重力和浊流与自由表面界面相互作用
  • 批准号:
    1067847
  • 财政年份:
    2011
  • 资助金额:
    $ 22.5万
  • 项目类别:
    Standard Grant

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