The effect of unsteady turbulent flows on mass transfer in aquatic environments

非定常湍流对水生环境中传质的影响

基本信息

  • 批准号:
    RGPIN-2015-05680
  • 负责人:
  • 金额:
    $ 1.97万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2020
  • 资助国家:
    加拿大
  • 起止时间:
    2020-01-01 至 2021-12-31
  • 项目状态:
    已结题

项目摘要

The objectives of the proposed research program are to examine the role of mass transport on fundamental biogeochemical and ecological processes using a combination of experimental, field, and computational approaches. Specifically, I will examine the influence of turbulence on nutrient uptake, suspension feeding/particle fate, and particle flux that occur in the benthos (sediments, macrophytes, bivalves) of aquatic systems. In doing so, I will examine the role of unsteady flow - including the fluid-structure interactions that cause organisms to oscillate - in addition to the influence of mean flow conditions on these processes. My specific objectives are to investigate/determine the: (1) fluid-macrophyte interactions and how turbulence-induced plant movements affect macrophyte productivity through the transport and uptake of dissolved inorganic carbon to the leaf surface where nutrient uptake occurs; (2) fate of particles (including biological ones) transported through beds of suspension feeding freshwater mussels; and (3) the effect of collector motion on particle capture, which is an essential mass transport mechanism. The fulfillment of these objectives relates directly to a better understanding of the productivity and function of aquatic environments. As an empiricist, I operate within a theoretical framework set by the fluid dynamics and modified by the specific attributes of the organism/system under study. This allows me to establish hypotheses based on existing physical theory and to examine whether ecological/biogeochemical processes conform to the expectations of that theory. In this way, it is possible to draw broader conclusions and further the development of theories of organism-environmental interactions. This often requires the use of a simplification, such as restricting the movement/geometry of an organism and using steady flow conditions, to ensure that conditions conform to the physical model (e.g. leaves of a plant must be flat and parallel to the flow direction to examine mass transport using the flat plate analogy). By incorporating unsteady flow conditions, including flow-induced interactions, I will be able to advance our understanding of biogeochemical/ecological response to hydrodynamics forcing. The results of this research program will facilitate the development of novel models of the unsteady conditions found in nature, which will inform scientists, engineers, and managers. There are direct implications for the fate/transport of contaminants, which are influenced if not dominated by surface phenomena. The results will also be used to address/mitigate the impacts of human activities on habitat and on water quality.
拟议的研究计划的目标是研究质量传输的作用,基本的地球化学和生态过程中使用的实验,现场和计算方法相结合。具体而言,我将研究湍流对营养吸收,悬浮物喂养/颗粒命运,和颗粒通量发生在底栖生物(沉积物,水生植物,双壳类)的水生系统的影响。在这样做的时候,我将检查的作用,不稳定的流动-包括流体结构的相互作用,导致生物体振荡-除了这些过程中的平均流量条件的影响。我的具体目标是调查/确定:(1)流体-水生植物的相互作用,以及植物运动如何通过将溶解的无机碳运输和吸收到营养吸收发生的叶表面来影响水生植物的生产力;(2)颗粒的命运(包括生物性的)通过以悬浮物为食的淡水贻贝的河床迁移;(3)收集器运动对粒子捕获的影响,这是一种基本的质量传输机制。这些目标的实现直接关系到更好地了解水环境的生产力和功能。 作为一名生物学家,我在由流体动力学设定的理论框架内工作,并根据所研究的有机体/系统的特定属性进行修改。这使我能够根据现有的物理理论建立假设,并检查生态/地球化学过程是否符合该理论的期望。通过这种方式,可以得出更广泛的结论,并进一步发展生物体与环境相互作用的理论。这通常需要使用简化,例如限制有机体的运动/几何形状和使用稳定的流动条件,以确保条件符合物理模型(例如,植物的叶子必须是平坦的,并且平行于流动方向,以使用平板模拟来检查质量传输)。 通过结合非定常流条件,包括流动引起的相互作用,我将能够推进我们的理解的地球化学/生态响应水动力学强迫。这项研究计划的结果将促进自然界中发现的非稳态条件的新模型的开发,这将为科学家,工程师和管理人员提供信息。这对污染物的归宿/迁移有着直接的影响,即使不受地表现象的支配,也会受到其影响。研究结果还将用于处理/减轻人类活动对生境和水质的影响。

项目成果

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Ackerman, Josef其他文献

Ackerman, Josef的其他文献

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{{ truncateString('Ackerman, Josef', 18)}}的其他基金

Unsteady hydrodynamic conditions and biological/biogeochemical processes
非稳态水动力条件和生物/生物地球化学过程
  • 批准号:
    RGPIN-2022-04337
  • 财政年份:
    2022
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
Using eddy correlation to measure oxygen flux as an indicator of the health of aquatic systems
使用涡相关测量氧通量作为水生系统健康状况的指标
  • 批准号:
    RTI-2022-00200
  • 财政年份:
    2021
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Research Tools and Instruments
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2021
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2019
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2018
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2017
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
Measurement of mass transfer in rivers and shallow waters
河流和浅水区传质测量
  • 批准号:
    RTI-2018-00249
  • 财政年份:
    2017
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Research Tools and Instruments
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2016
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2015
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual
Mass transport in aquatic environments
水生环境中的大众运输
  • 批准号:
    170457-2008
  • 财政年份:
    2014
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Discovery Grants Program - Individual

相似国自然基金

振荡叶栅非定常流动特性与叶片颤振分析研究
  • 批准号:
    50376053
  • 批准年份:
    2003
  • 资助金额:
    24.0 万元
  • 项目类别:
    面上项目

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Evaluating the complexity of unsteady turbulent flows using excess entropy
使用过剩熵评估非定常湍流的复杂性
  • 批准号:
    2327661
  • 财政年份:
    2023
  • 资助金额:
    $ 1.97万
  • 项目类别:
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Evaluating the complexity of unsteady turbulent flows using excess entropy
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职业:基于物理的自动蒸馏非定常和湍流中的相干结构和机制
  • 批准号:
    2238770
  • 财政年份:
    2022
  • 资助金额:
    $ 1.97万
  • 项目类别:
    Continuing Grant
The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
    RGPIN-2015-05680
  • 财政年份:
    2021
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    $ 1.97万
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空化湍流非定常分析的统一方法
  • 批准号:
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  • 财政年份:
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极高雷诺数湍流非定常模拟的实现
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The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
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    2019
  • 资助金额:
    $ 1.97万
  • 项目类别:
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The effect of unsteady turbulent flows on mass transfer in aquatic environments
非定常湍流对水生环境中传质的影响
  • 批准号:
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非定常湍流对水生环境中传质的影响
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    RGPIN-2015-05680
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三维非定常和湍流实验流中分离的提取
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