Mathematical Modelling of Particle-Laden Turbulent Flows

含颗粒湍流的数学建模

基本信息

  • 批准号:
    RGPIN-2020-04778
  • 负责人:
  • 金额:
    $ 3.35万
  • 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:
    2021
  • 资助国家:
    加拿大
  • 起止时间:
    2021-01-01 至 2022-12-31
  • 项目状态:
    已结题

项目摘要

This research program is concerned with the development of mathematical models to predict the motion of particulates in gaseous turbulent flows. Particle-laden turbulent flows occur in a broad range of engineering problems including pollution dispersion in atmospheric flows, spray combustion, ventilation, and medicinal aerosol drug delivery systems. Computational fluid dynamics (CFD) provides the engineering designer or analyst with information on the fluid flow and particle velocities and concentrations within the domain. This allows for development of enhanced engineering designs. There is therefore a need for robust mathematical models of particulate motion that are able to capture the complexities of the fluid-turbulence/particulate interaction, while also maintaining reasonable computational effort. Fluid turbulence influences a vast array of particle-flow characteristics including the dispersion and drift of particles, the rate of deposition on solid surfaces, and the rate of mixing of fuel droplets or solid particles with air for combusting flows. Spatial variations in turbulence intensity can result in particles accumulating in regions of low turbulent kinetic energy. Even within homogeneous turbulent flows, local clustering of the particles can occur due to the influence of underlying turbulent structure; particles with a time constant similar to the smallest turbulent time scale can be ejected from vortical turbulent structures and tend to concentrate locally in regions of high strain and low vorticity.  Moreover, the presence of the particles can influence the underlying fluid velocity field.    Two-way coupling between the gas and particulate phase is complex. For example, depending on the particle time constant and size relative to the important turbulent scales, particles can enhance turbulence production through vortex shedding or can act to modulate the turbulent kinetic energy as a result of a transfer of momentum from the fluid to the particles. The objective of this research program is to develop particle-laden flow models that accurately capture the complex physics of particle-fluid turbulence interactions. This includes the ability to predict the impacts of unresolved turbulence structure, turbulence inhomogeneity and anisotropy, and two-way coupling.  This research will build on the previous work that we have done on model development and assessment for large eddy simulation and Reynolds-averaged Navier-Stokes turbulence modelling frameworks for CFD simulation of particle-laden turbulent flows.  Direct numerical simulation is used as a benchmarking tool.  This research will lead to improved models for incorporation into commercial or open-source CFD codes used in industry.  In addition, the rigorous training that the highly qualified personnel will receive will provide industry with CFD analysts with a strong theoretical foundation which is critical for successful CFD simulation and analysis.
这项研究计划致力于发展数学模型来预测颗粒在气体湍流中的运动。颗粒湍流存在于广泛的工程问题中,包括大气中的污染扩散、喷雾燃烧、通风和药物气雾剂给药系统。计算流体动力学(CFD)为工程设计人员或分析人员提供有关流体流动、颗粒速度和浓度的信息。这允许开发改进的工程设计。因此,需要稳健的颗粒运动数学模型,能够捕捉流体-湍流/颗粒相互作用的复杂性,同时还保持合理的计算工作量。流体湍流影响大量的颗粒流动特性,包括颗粒的分散和漂移、固体表面的沉积速率以及燃料液滴或固体颗粒与空气混合以燃烧流动的速率。湍流强度的空间变化会导致颗粒聚集在湍流动能较低的区域。即使在均匀湍流中,由于底层湍流结构的影响,颗粒也可能发生局部聚集;具有与最小湍流时间尺度相似的时间常数的颗粒可以从涡旋湍流结构中喷射出来,并倾向于在高应变和低涡度区域局部聚集。此外,颗粒的存在会影响底层流体速度场。气体和颗粒相之间的双向耦合是复杂的。例如,根据颗粒时间常数和相对于重要湍流尺度的大小,颗粒可以通过旋涡脱落来增强湍流的产生,或者可以作为动量从流体传递到颗粒的结果来调节湍流动能。该研究计划的目标是开发能够准确捕捉颗粒-流体湍流相互作用的复杂物理现象的颗粒载流模型。这包括预测未解决的湍流结构、湍流的不均匀性和各向异性以及双向耦合的影响的能力。这项研究将建立在我们之前所做的大涡模拟的模型开发和评估工作的基础上,以及雷诺平均的Navier-Stokes湍流模型框架用于颗粒湍流的CFD模拟。直接数值模拟被用作基准工具。这项研究将导致改进的模型,以用于商业或工业中使用的开源CFD代码。此外,高素质人员将接受严格的培训,这将为行业CFD分析师提供坚实的理论基础,这是成功进行CFD模拟和分析的关键。

项目成果

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Lightstone, Marilyn其他文献

Lightstone, Marilyn的其他文献

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{{ truncateString('Lightstone, Marilyn', 18)}}的其他基金

Mathematical Modelling of Particle-Laden Turbulent Flows
含颗粒湍流的数学建模
  • 批准号:
    RGPIN-2020-04778
  • 财政年份:
    2022
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
Mathematical Modelling of Particle-Laden Turbulent Flows
含颗粒湍流的数学建模
  • 批准号:
    RGPIN-2020-04778
  • 财政年份:
    2020
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
CFD analysis of natural convection heat transfer in volumetrically heated corium melt for CANDU reactors
CANDU 反应器容积式加热真皮熔体中自然对流换热的 CFD 分析
  • 批准号:
    508442-2016
  • 财政年份:
    2020
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Collaborative Research and Development Grants
CFD analysis of natural convection heat transfer in volumetrically heated corium melt for CANDU reactors
CANDU 反应器容积式加热真皮熔体中自然对流换热的 CFD 分析
  • 批准号:
    508442-2016
  • 财政年份:
    2019
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Collaborative Research and Development Grants
Mathematical modelling of particle-laden turbulent flows
含颗粒湍流的数学建模
  • 批准号:
    203162-2012
  • 财政年份:
    2019
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
Mathematical modelling of particle-laden turbulent flows
含颗粒湍流的数学建模
  • 批准号:
    203162-2012
  • 财政年份:
    2018
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
CFD analysis of natural convection heat transfer in volumetrically heated corium melt for CANDU reactors
CANDU 反应器容积式加热真皮熔体中自然对流换热的 CFD 分析
  • 批准号:
    508442-2016
  • 财政年份:
    2018
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Collaborative Research and Development Grants
CFD analysis of natural convection heat transfer in volumetrically heated corium melt for CANDU reactors
CANDU 反应器容积式加热真皮熔体中自然对流换热的 CFD 分析
  • 批准号:
    508442-2016
  • 财政年份:
    2017
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Collaborative Research and Development Grants
Mathematical modelling of particle-laden turbulent flows
含颗粒湍流的数学建模
  • 批准号:
    203162-2012
  • 财政年份:
    2015
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
Mathematical modelling of ground source heat exchangers
地源换热器的数学建模
  • 批准号:
    477482-2014
  • 财政年份:
    2014
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Engage Grants Program

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  • 批准年份:
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Mathematical Modelling of Particle-Laden Turbulent Flows
含颗粒湍流的数学建模
  • 批准号:
    RGPIN-2020-04778
  • 财政年份:
    2022
  • 资助金额:
    $ 3.35万
  • 项目类别:
    Discovery Grants Program - Individual
Mathematical Modelling of Particle-Laden Turbulent Flows
含颗粒湍流的数学建模
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  • 财政年份:
    2020
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Mathematical modelling of particle-laden turbulent flows
含颗粒湍流的数学建模
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Mathematical modelling of particle-laden turbulent flows
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含颗粒湍流的数学建模
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含颗粒湍流的数学建模
  • 批准号:
    203162-2012
  • 财政年份:
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  • 资助金额:
    $ 3.35万
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含颗粒湍流的数学建模
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