Benchmark Data and Analysis of Dilute and Dense-Phase, Fluid-Particle Flow in the Collisional, Viscous, and Transition Regimes

碰撞、粘性和过渡状态下稀相、密相、流体-颗粒流的基准数据和分析

• 批准号: 0651667
• 负责人: Jennifer Curtis
• 金额: $ 24万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-04-01 至 2010-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0651667&HistoricalAwards=false
• 关键词: Benchmark; Data; Analysis; Dilute; Dense

Proposal Number: 0651667Principal Investigators: Curtis, JenniferAffiliation: University of FloridaProposal Title: Benchmark Data and Analysis of Dilute and Dense-Phase, Fluid-Particle Flow in the Collisional, Viscous, and Transition RegimesFluid-particle flows are prevalent across a diverse range of industrial and geophysical processes. In many applications, particles engage in collisions with each other, and there are also complex interactions between the fluid and the solid phases that significantly influence these multiple particle collisions. Fundamental models that currently exist do not adequately describe fluid-particle flow in this "transitional" regime (as originally labeled by Bagnold (1954)). Instead, the vast majority of research (and the scientific community's best current understanding of fluid-particle flows) are for processes operating exclusively in either the inertia-dominated regime (where the influence of the fluid phase on the direct interactions between particles is neglected) or the macroviscous regime (where the fluid phase plays the significant role in the mechanics of particle momentum transport). The key limitation impeding improved understanding and the development of fundamental models is the lack of detailed, non-intrusive flow measurements in this "transitional" regime, as well as measurements which bridge the transitional regime with both the inertia-dominated and viscous-dominated regimes. The current body of experimental information for fluid-particle flows is highly piecemeal. Previous experimentation has focused on one specific regime of particulate flow over a limited range of operating conditions. The intellectual merit of the proposed work lies in the experimental measurements that are unifying in the sense that these novel measurements will bridge the gap between particle flow regimes over a range of solids concentrations and fluid flowrates. These experimental measurements will be made in a unique, pilot-scale, flow loop facility. This facility allows for operating conditions that span the regimes for particle flow behavior. Hence, these measurements will broadly impact our understanding of fluid-particle flows. The resulting flow measurements will provide a benchmark in the scientific literature for fluid-particle flow model development and validation. Improved flow models will yield significant advances in CFD simulations targeted towards scale-up operations, optimization and design of a wide variety of fluid-particle flows. In addition, there will be other broad impacts from the research through involvement of one PhD student and several undergraduate students each year via The University of Florida's Particle Engineering Research Center's (PERC's) Undergraduate Research Awards program. Finally, there will be broad impacts from the research via dissemination of our findings to the scientific community - both through journal publications/conference presentations and through the education of large numbers of students via courses offered through PERC. The dataset resulting from the effort will be made available to the public via a website maintained by the PI.

提案编号：0651667 主要研究员：Curtis, Jennifer 隶属关系：佛罗里达大学提案标题：碰撞、粘性和过渡状态下稀相、密相、流体颗粒流的基准数据和分析流体颗粒流在各种工业领域中都很普遍和地球物理过程。在许多应用中，颗粒之间会发生碰撞，并且流体和固相之间也存在复杂的相互作用，这些相互作用会显着影响这些多个颗粒的碰撞。目前存在的基本模型不能充分描述这种“过渡”状态下的流体-颗粒流（最初由 Bagnold (1954) 标记）。相反，绝大多数研究（以及科学界目前对流体颗粒流的最佳理解）都是针对仅在惯性主导状态下运行的过程（忽略了流体相对颗粒之间直接相互作用的影响）或宏观粘性状态（其中流体相在粒子动量传输力学中起着重要作用）。阻碍加深理解和发展基本模型的关键限制是缺乏这种“过渡”状态下详细的、非侵入式的流量测量，以及将过渡状态与惯性主导和粘性主导状态联系起来的测量。当前流体-颗粒流的实验信息非常零碎。以前的实验主要集中在有限范围的操作条件下的一种特定的颗粒流状态。所提出的工作的智力价值在于实验测量的统一，这些新颖的测量将弥合一系列固体浓度和流体流量上的颗粒流态之间的差距。这些实验测量将在独特的中试规模的流动回路设施中进行。该设施允许跨越颗粒流行为范围的操作条件。因此，这些测量将广泛影响我们对流体颗粒流的理解。由此产生的流量测量结果将为流体颗粒流模型开发和验证的科学文献提供基准。改进的流动模型将为 CFD 模拟带来重大进展，旨在扩大各种流体-颗粒流的操作、优化和设计。此外，每年一名博士生和几名本科生通过佛罗里达大学粒子工程研究中心 (PERC) 本科生研究奖计划参与该研究，还将产生其他广泛影响。最后，通过向科学界传播我们的研究结果，研究将产生广泛的影响——既通过期刊出版物/会议演讲，又通过 PERC 提供的课程对大量学生进行教育。这项工作产生的数据集将通过 PI 维护的网站向公众开放。