COLLABORATIVE RESEARCH: Dynamics of Inertial Particles in Thermally-Stratified Flows within Electromagnetic Field

合作研究：电磁场内热分层流中惯性粒子的动力学

基本信息

批准号：
1912824
负责人：
Leonardo Chamorro
金额：
$ 29.36万
依托单位：
University of Illinois at Urbana-Champaign
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-06-15 至 2023-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1912824&HistoricalAwards=false
关键词：
COLLABORATIVE RESEARCH Dynamics Inertial Particles

项目摘要

Despite the multiple applications and impact in industry, environment, health, and defense, the role of particles in thermal transport processes remains poorly understood. By characterizing the fluid dynamics and particles in thermally stratified media under various conditions, the project will provide new knowledge applicable to a range of phenomena including rain formation, pollutant transport, inhaled particulate matter transport and mixing in transcontinental gas ducts. Additionally, by exploring the possibility of using magnetic particles as a control mechanism, the project will offer strategies to regulate industrial processes, with potentially increasing their efficiency. The research will provide insight on the control of thermal mixing for industrial as well as biological systems. The project will directly contribute to STEM education of K-12 students and educational development of both graduate and undergraduate students; significant efforts will be made to disseminate the results to the broader scientific community and to society.The project aims to quantitatively describe and significantly improve our understanding of the phenomena resulting from the interaction between thermally-stratified turbulent convection with inertial particles. Advanced experimental flow-diagnostic tools will be used to track a large set of inertial particles and flow tracers at high spatial and temporal resolutions. The work will examine the dominant factors modulating the dynamics of the particles, flow instability triggered by particles, preferential concentration, two- and four-way coupling between particles and flow. Special attention will be placed on characterizing such phenomena under disturbed natural convection via additional boundary conditions and electromagnetic control on particles. Analysis will include Eulerian and Lagrangian statistics as well as highly resolved trajectories, velocity, and acceleration of large set of particles. Results will uncover the role of control variables including the Stokes and Rayleigh numbers and volume fraction, which will provide basis for the development of strategies to control thermal processes in various applications.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.

尽管在行业，环境，健康和防御中产生了多种应用和影响，但颗粒在热运输过程中的作用仍然很少了解。通过在各种条件下表征热分层培养基中的流体动力学和颗粒，该项目将提供适用于一系列现象的新知识，包括雨形成，污染物转运，吸入颗粒物质传输和透染色导管中的混合。此外，通过探索将磁性颗粒作为控制机制的可能性，该项目将提供调节工业过程的策略，并可能提高其效率。这项研究将为控制工业和生物系统的热混合的控制提供见解。该项目将直接有助于K-12学生的STEM教育以及研究生和本科生的教育发展；该项目旨在定量描述并显着提高我们对热分层的湍流对流与惯性颗粒之间相互作用所产生的现象的理解，并显着地描述并显着提高我们对现象的理解。先进的实验流诊断工具将用于在高空间和时间分辨率下跟踪大量惯性颗粒和流动示踪剂。这项工作将检查调节颗粒动力学的主要因素，粒子，优先浓度，颗粒和流动之间的两向耦合触发的流动不稳定性。将特别注意通过其他边界条件和颗粒上的电磁控制在受干扰的自然对流下表征这种现象。分析将包括Eulerian和Lagrangian统计数据，以及高度分辨的轨迹，速度和大量颗粒的加速度。结果将揭示控制变量在内的作用，包括Stokes和Rayleigh数字和音量分数，这将为制定各种应用中控制热过程的策略提供基础。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。