Beyond Horizontal Convection

超越水平对流

基本信息

  • 批准号:
    1259580
  • 负责人:
  • 金额:
    $ 37.34万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2013
  • 资助国家:
    美国
  • 起止时间:
    2013-03-15 至 2016-02-29
  • 项目状态:
    已结题

项目摘要

Intellectual Merit: This project extend the investigators? work on horizontal convection which refers to the circulation resulting from differential heating along one horizontal boundary of a fluid and is seen as the simplest dynamical element contributing to the oceanic Meridional Overturning Circulation (MOC). The full problem of the MOC is complex and difficult, involving thermal, haline and mechanical forcing. The investigators on this project have been working on understanding single-component horizontal convection, which is commonly viewed as a simplified conceptual model of the MOC. This work, and that of other groups, suggests that the gap between horizontal convection and the MOC is not only quantitative, but also qualitative. The goal of this project is to move from the overly simplified problem of horizontal convection toward the richer dynamical setting of the ocean by conducting further laboratory and numerical experiments. The following hypotheses will be addressed:1. Deep stratification is largely set by the interaction between the vertical transport of buoyancy in the depth-varying, negatively buoyant plume and the lateral transport due to baroclinic eddies.2. Kinetic energy dissipation in rotating horizontal convection with and without surface stress occurs primarily in the interior of the flow and is not due to bottom drag. Direct Numerical Simulations indicate that this is true yet ocean circulation simulations with parameterized convection and turbulence suggest otherwise.3. An input of mechanical energy in the form of a surface stress in opposition to a buoyancy-driven circulation leads to a two-cell circulation, in which the system is no longer governed by classical scaling arguments.4. Spatial variability of the applied surface stress introduces new dynamical responses and energy pathways. The relative phase between wind and buoyancy forcing is thus important.Broader Impacts: This renewal project will enable two graduate students to finish their thesis research and acquire skills in laboratory work and computational fluid dynamics. To reach pre-college students, the investigators will continue to contribute to the professional development of high school teachers in the San Diego Unified School District. In partnership with the NSF-funded Center for Ocean Science Education Excellence ? California, they will sponsor a one-day workshop for approximately 25 Earth sciences teachers. The numerical simulations in this project will be used as examples in a seminar class on scientific computing, aimed at introducing graduate students carrying out computational research at the Scripps Institution of Oceanography to the NSF-supported supercomputing facilities.
智力优势:这个项目扩展了调查人员?水平对流是指流体沿沿着一个水平边界的差异加热所产生的环流,被认为是对海洋经向翻转环流(MOC)有贡献的最简单的动力学要素。MOC的全部问题是复杂和困难的,涉及热,盐和机械强迫。该项目的研究人员一直致力于理解单组分水平对流,这通常被视为MOC的简化概念模型。这项工作和其他小组的工作表明,水平对流和MOC之间的差距不仅是定量的,而且是定性的。该项目的目标是通过进一步的实验室和数值实验,从过于简化的水平对流问题转向海洋更丰富的动力学环境。以下假设将得到解决:1。深度层结主要是由深度变化的负浮力羽流中浮力的垂直输送和斜压涡旋引起的横向输送之间的相互作用确定的。在有和没有表面应力的旋转水平对流中,动能耗散主要发生在流动的内部,而不是由于底部阻力。直接数值模拟表明这是正确的,但海洋环流模拟与参数化对流和湍流表明相反。与浮力驱动的环流相反的表面应力形式的机械能输入导致了双胞环流,其中系统不再受经典标度参数的支配。所施加的表面应力的空间变异性引入了新的动力学响应和能量途径。更广泛的影响:该更新项目将使两名研究生能够完成论文研究,并获得实验室工作和计算流体动力学方面的技能。为了接触大学预科学生,调查人员将继续为圣地亚哥联合学区高中教师的专业发展做出贡献。与NSF资助的海洋科学教育卓越中心合作?在加州,他们将为大约25名地球科学教师举办为期一天的讲习班。该项目中的数值模拟将被用作科学计算研讨班的示例,旨在向在斯克里普斯海洋研究所进行计算研究的研究生介绍NSF支持的超级计算设施。

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)
The response of surface buoyancy flux-driven convection to localized mechanical forcing
表面浮力通量驱动对流对局部机械力的响应
  • DOI:
    10.1007/s00348-019-2722-5
  • 发表时间:
    2019
  • 期刊:
  • 影响因子:
    2.4
  • 作者:
    Matusik, Katarzyna E.;Llewellyn Smith, Stefan G.
  • 通讯作者:
    Llewellyn Smith, Stefan G.
Energy Cascades and Loss of Balance in a Reentrant Channel Forced by Wind Stress and Buoyancy Fluxes
  • DOI:
    10.1175/jpo-d-14-0068.1
  • 发表时间:
    2015-01
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    R. Barkan;K. Winters;S. G. L. Smith
  • 通讯作者:
    R. Barkan;K. Winters;S. G. L. Smith
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Stefan Llewellyn Smith其他文献

swirlをもつ磁気渦輪のcontour dynamicsとその一般化
含涡流的磁涡环轮廓动力学及其推广
  • DOI:
  • 发表时间:
    2012
  • 期刊:
  • 影响因子:
    0
  • 作者:
    服部裕司;Stefan Llewellyn Smith
  • 通讯作者:
    Stefan Llewellyn Smith
A transform pair for bounded convex planar domains
有界凸平面域的变换对
  • DOI:
  • 发表时间:
    2023
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Jesse Hulse;Loredana Lanzani;Stefan Llewellyn Smith;Elena Luca
  • 通讯作者:
    Elena Luca

Stefan Llewellyn Smith的其他文献

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{{ truncateString('Stefan Llewellyn Smith', 18)}}的其他基金

Complex Analysis: Techniques, Applications and Computations
复杂分析:技术、应用和计算
  • 批准号:
    1933403
  • 财政年份:
    2019
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
Collaborative Research: Radiatively Driven Convection in a deep freshwater lake
合作研究:淡水深湖中的辐射驱动对流
  • 批准号:
    1829919
  • 财政年份:
    2018
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
The dynamics of buoyant vortices
浮力涡动力学
  • 批准号:
    1706934
  • 财政年份:
    2017
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
Collaborative Research: Riemann-Hilbert Problems and Riemann Surfaces: Computations and Applications
协作研究:黎曼-希尔伯特问题和黎曼曲面:计算和应用
  • 批准号:
    1522675
  • 财政年份:
    2015
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Continuing Grant
Collaborative Research: Beyond Point Vortices: Moving Singularities and Wave Fields in Fluid Mechanics
合作研究:超越点涡:流体力学中的移动奇点和波场
  • 批准号:
    0970113
  • 财政年份:
    2010
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
Horizontal convection: the role of turbulence
水平对流:湍流的作用
  • 批准号:
    0926481
  • 财政年份:
    2009
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
CAREER: Flutter, Tumble and Fall: Extending Maxwell's Problem of the Falling Plate, and Using Sports as an Educational Aid in Science and Engineering
职业:扑腾、翻滚和跌倒:扩展麦克斯韦落板问题,并利用体育作为科学和工程的教育辅助手段
  • 批准号:
    0133978
  • 财政年份:
    2002
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Continuing Grant

相似海外基金

Horizontal convection at ocean-relevant proportions
与海洋相关的水平对流
  • 批准号:
    DP180102647
  • 财政年份:
    2018
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Discovery Projects
Numerical study of heat and momentum transport in horizontal convection at large Rayleigh numbers
大瑞利数水平对流热和动量传输的数值研究
  • 批准号:
    392375701
  • 财政年份:
    2017
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Research Grants
The elusive upper bound of heat transfer in horizontal convection
水平对流传热难以捉摸的上限
  • 批准号:
    DP150102920
  • 财政年份:
    2015
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Discovery Projects
Heat transfer of natural convection from vertical and horizontal rows of multiple heat sources and their non-dimensional correlations
垂直和水平排多个热源的自然对流传热及其无量纲相关性
  • 批准号:
    15K05823
  • 财政年份:
    2015
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Horizontal Convection at Large Rayleigh Number: Laboratory Experiments and Direct Numerical Simulation
大瑞利数水平对流:实验室实验和直接数值模拟
  • 批准号:
    1155558
  • 财政年份:
    2012
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
Enhancing natural convection heat transfer using a single horizontal non-metallic fin
使用单个水平非金属翅片增强自然对流换热
  • 批准号:
    DP1097007
  • 财政年份:
    2010
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Discovery Projects
Horizontal convection: the role of turbulence
水平对流:湍流的作用
  • 批准号:
    0926481
  • 财政年份:
    2009
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Standard Grant
Mixed convection from a horizontal cylinder covered with a porous layer
来自覆盖有多孔层的水平圆柱体的混合对流
  • 批准号:
    354422-2007
  • 财政年份:
    2007
  • 资助金额:
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  • 项目类别:
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Collaborative Research: CMG--Anti-Turbulence, Horizontal Convection and Thermalence
合作研究:CMG--抗湍流、水平对流和热力
  • 批准号:
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  • 财政年份:
    2002
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Continuing Grant
Collaborative Research: CMG--Anti-Turbulence, Horizontal Convection and Thermalence
合作研究:CMG--抗湍流、水平对流和热力
  • 批准号:
    0222104
  • 财政年份:
    2002
  • 资助金额:
    $ 37.34万
  • 项目类别:
    Continuing Grant
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